MITCHELL, Justice.
The defendant was convicted of the first degree murder of Edna Cordell Powell and sentenced to death. He brings forward assignments of error relative to the guilt-innocence phase of his trial and the sentencing phase. Having considered with care the entire record and each of the assignments, we find no prejudicial error in either phase of the defendant’s trial. We do not disturb the defendant’s conviction or the sentence of death.
The evidence as presented by the State tended to show that in December 1982 the defendant, David Earl Huffstetler, and his wife, Ruby Huffstetler, lived in a trailer on Highway 161 in Kings [96]*96Mountain. The deceased, Edna Powell, was Ruby Huffstetler’s mother. She was sixty-five years old and lived in a trailer next door to the Huffstetlers. Mrs. Huffstetler visited her mother during the afternoon of December 31, 1982. Later that day Mrs. Huffstetler went with her daughter Kim to spend the night in a motel in Kings Mountain. Around 10:00 p.m. on that date, several long distance calls that she did not make were made from the telephone in the Huffstetler’s trailer. Mrs. Huffstetler did not know where the defendant spent the night on December 31.
Another daughter of the deceased, Barbara Shannon, visited her mother at about 8:00 p.m. on December 31. During the time Mrs. Shannon and her family were visiting, Mrs. Powell received a telephone call. After the call, Mrs. Powell phoned her granddaughter, Ruby Huffstetler’s daughter Debbie Sutton, who lived with the Huffstetlers. Mrs. Powell asked her granddaughter where Mrs. Huffstetler was. After ending the conversation with her granddaughter, Mrs. Powell called the police. Mrs. Powell then went with the Shannons to their home in Gastonia to spend the night.
On January 1, 1983, at approximately 6:00 a.m., Mr. Shannon took Mrs. Powell back to her home in Kings Mountain. He left after checking throughout the trailer and finding nothing suspicious.
A friend of Mrs. Powell’s from work, Miller Eugene Hughes, drove her to First Union Bank in Kings Mountain to do “some banking” on December 31, 1982. He also made plans with Mrs. Powell to take her to the Veterans Hospital in Asheville early on the morning of January 1 so that she could visit her husband. Mrs. Powell asked him to call her before he came by to pick her up on the morning of January 1. He called Mrs. Powell’s trailer three times at about 7:50 a.m. on January 1, 1983. He received no answer. He called two more times after that, thirty to forty minutes apart, but never got a response.
Paul Glenn Sisk was working for the Yellow Cab Company on the morning of January 1. At about 8:00 a.m. a call came in to the dispatcher for the company, and Sisk answered the phone. Sisk recognized the defendant’s voice. The caller identified himself as David Huffstetler. The caller asked that a cab be sent to a point on Highway 161 about two miles out of Kings Mountain at two [97]*97churches. William Wilde, another employee of Yellow Cab, drove a cab towards Kings Mountain to pick up David Huffstetler. Although he drove out toward Highway 161 he never found Huffstetler.
Alice Cantrell testified that the defendant was a friend of hers and that he came to visit her on January 1, 1983 at about 10:00 a.m. He came into the room where she was sleeping and asked if she wanted to shoot pool. Ms. Cantrell and the defendant stayed together all day long at the home of Ms. Cantrell’s sister. The two worked on a car most of the day. The defendant, Ms. Cantrell and her two sons spent the night of January 1 in a motel in Kings Mountain. Ms. Cantrell and the defendant stayed together for two days after January 1 spending the second night in Ms. Cantrell’s mother’s home.
Debbie Sutton, the granddaughter of the deceased, testified that on January 1, 1983 she was living in the trailer where her mother Ruby Huffstetler lived with the defendant. She saw the defendant leave with her mother and her sister on December 31. Her mother came back home without the defendant. She later saw her mother on the evening of December 31 at a New Year’s Eve party, but the defendant was not with her mother. Ms. Sutton returned to her mother’s trailer around 4:00 a.m. on the morning of January 1, 1983. She stated that she went to bed and got up late the next day. She did not leave the trailer again that day.
The deceased’s daughter, Mrs. Shannon, began to try to call her mother at her mother’s trailer between 4:00 and 4:30 p.m. on January 1. She received no answer and continued to call every thirty minutes until 6:00 p.m. After a final unsuccessful attempt to reach her mother, she called Deborah Sutton and asked her to go to Mrs. Powell’s trailer and tell Mrs. Powell to come to the phone. Ms. Sutton went next door to her grandmother’s trailer. She opened the unlocked door, entered and found the body of Mrs. Powell lying on the floor of the kitchen. She testified that she could tell her grandmother was dead because her head was “bashed in.”
The police were called at 7:15 p.m. on January 1 and arrived at the Powell residence shortly thereafter. Officer Richard Red-ding of the Gaston County Police Department testified that after being called to the Powell residence, he went inside the de[98]*98ceased’s trailer and observed Mrs. Powell lying in a large amount of blood on the kitchen floor. The blood was spattered along the dryer and on the refrigerator in the kitchen. He also observed a pair of false teeth located under the front edge of the clothes dryer. A black metal fragment was found on the east wall of the kitchen area. A wall style telephone was not hanging in its place in the entryway of the trailer, but instead had been placed in a chair at the entry point. Officers found hair samples and metal fragments on the carpet.
Law enforcement officers searched the area surrounding the victim’s home and found a black plastic garbage bag containing bloodstained clothes approximately two-tenths of a mile from the victim’s trailer. The bag contained a pair of jeans and a shirt identified by Mrs. Huffstetler as belonging to her husband, the defendant. The bag also contained a bloody crumpled bank envelope from First Union Bank and a pair of gloves identified by the defendant’s wife as similar to a pair owned by her husband.
An S.B.I. hair analyst testified that several hairs found on the gloves were microscopically consistent with hairs taken from the victim. An S.B.I. forensic serologist testified that blood samples taken from the clothes found in the bag were consistent with the blood type of the victim and inconsistent with the blood type of the defendant.
Officers found a broken cast-iron skillet and its handle approximately a hundred feet from the defendant’s trailer. The skillet was bloodstained and bore hairs microscopically consistent with the hair of the victim. The metal fragment found beside the head of the victim in her trailer fit into the broken skillet.
A pathologist, Dr. Phillip Leone, performed an autopsy on the body of the deceased. He testified that Mrs. Powell had multiple wounds and lacerations about her head, neck and shoulders. He found more than fourteen lacerations on her head and body. Both eyes were massively bruised and swollen shut, and blood was found in both nostrils and in her mouth. The victim’s jaws were broken on both sides so that the lower jaw moved freely. The victim’s spine and neck were fractured, as was her left collarbone. There was a large head wound behind the right ear in which the skull had been pushed into the brain. The pathologist also described a bilateral skull fracture and a “tremendous” [99]*99hemorrhage in the brain. The cause of death in the opinion of the pathologist was skull fractures, hemorrhaging, edema of the brain and injury to major life centers causing cardio-respiratory arrest. The pathologist testified that in his opinion the fourteen lacerations of the head were caused by separate blows and that an object such as a cast-iron skillet could have inflicted the wounds.
The defendant did not testify or offer evidence at the guilt-innocence phase of the trial. The jury found him guilty of murder in the first degree.
Prior to the sentencing hearing, the trial court disallowed the State’s attempt to offer evidence that the defendant was involved in an armed robbery on the day of the murder. The State offered no further evidence but requested that the trial court submit as an aggravating circumstance that the killing was an especially heinous, atrocious or cruel murder under N.C.G.S. 15A-2000(e)(9).
The defendant testified in his own behalf at the sentencing hearing. He stated that he was taking $150 to $200 worth of the drug dilaudid per day at the time of the murder. He supported himself with money he got shoplifting and working.
On December 31, 1982, he went to the Yellow Cab Company and drank some liquor with employee Bill Wilde. He stole some money from the Yellow Cab Company at that time. He then went to a house in East Gastonia and injected two crushed up dilaudid pills. He got a ride home to his trailer on Highway 161 at about 10:00 p.m. on December 31. He drank some whiskey after arriving home and went to sleep. On rising the following morning, he injected two more dilaudid pills and drank more liquor.
The defendant testified that about 8:00 a.m. on January 1, 1983, he went next door to visit the deceased, his mother-in-law. After talking with Mrs. Powell a little, the defendant asked her whether she knew where his wife was. Mrs. Powell said that she did not and asked whether the defendant had been drinking. The defendant told Mrs. Powell that he had to have a drink around there to find out where his wife was because nobody would tell him anything. Mrs. Powell replied, “David, you’re a darned liar. I don’t know where she’s at. All I know is you called me and said all hell was going to break loose if somebody didn’t come and pick [100]*100you up.” The defendant said, “I know I didn’t say no such thing.” Mrs. Powell replied, “I know you did.”
The defendant testified that “we was just arguing, and I grabbed a frying pan and started hitting her.” The defendant did not remember how many times he struck Mrs. Powell but testified that he was not angry with her. He stated that “it just happened in an argument.” The defendant then left the trailer, went to his own trailer to change clothes and got a pair of gloves. He went back to his mother-in-law’s trailer, picked up the frying pan while wearing the gloves, and threw the pan away. He put his bloodied clothes in a plastic trash bag and threw the trash bag away nearby. He then got a ride to the house where Alice Cantrell was staying. He stayed with Ms. Cantrell until his arrest on January 3.
Other members of the defendant’s family testified that the defendant was not a violent or mean man when he was growing up. They had noticed little animosity between the defendant and his mother-in-law Mrs. Powell, the deceased.
The trial court instructed the jury that it could find as an aggravating circumstance that the murder was especially heinous, atrocious, or cruel. The trial court instructed that the jury could find in mitigation that: (a) the defendant’s capacity to appreciate the criminality of his conduct or to conform his conduct to the requirements of the law was impaired; (b) the killing occurred contemporaneously with an argument between the defendant and the victim, a person whom he knew by virtue of the domestic relationship, and by means of an instrument acquired at the scene and not taken there; (c) the defendant did not have a history of violent conduct; and (d) any other mitigating circumstance arising from the evidence.
The jury found the murder of Edna Powell to be especially heinous, atrocious or cruel. They found the existence of the following mitigating circumstances: (1) that the defendant’s capacity to appreciate the criminality of his conduct or to conform his conduct to the requirements of law was impaired; (2) that the killing occurred contemporaneously to an argument and by means of an instrument acquired at the scene and not taken there; (3) that the defendant did not have a history of violent conduct. The jury specifically found that there were no other circumstances which it [101]*101deemed to have mitigating value. The jury returned a recommendation of death.
Guilt-Innocence Phase
The defendant first contends that the trial court erred when it denied his motions for individual voir dire of the jury venire and for sequestration of the jury venire. He also contends that the trial court erred when it denied his motion to prohibit jury dispersal. The defendant concedes that these matters are within the trial court’s discretion and that error may be found only upon a showing of abuse of discretion. State v. Stokes, 308 N.C. 634, 304 S.E. 2d 184 (1983). The defendant acknowledges that he has shown no abuse of discretion. These contentions of error are without merit.
The defendant next contends that the procedure of “death qualifying” the jury for the guilt-innocence phase of his trial resulted in a guilt prone jury and deprived him of a fair trial. We have repeatedly rejected such arguments. E.g. State v. Murray, 310 N.C. 541, 313 S.E. 2d 523 (1984). This contention of error is without merit.
The defendant also contends that the trial court erred by its failure to hold unconstitutional the North Carolina statutes providing for the imposition of the death penalty. On numerous occasions we have upheld the constitutionality of our death penalty statutes. E.g. State v. Jackson, 309 N.C. 26, 305 S.E. 2d 703 (1983); State v. Rook, 304 N.C. 201, 283 S.E. 2d 732 (1981), cert. denied, 455 U.S. 1038 (1982). This contention of error is without merit.
[3J The defendant next contends that the trial court made an inaccurate and prejudicial statement in its opening remarks to potential jurors. The trial court’s statements were as follows:
Now, members of the jury, first degree murder is a crime for which the death penalty may be imposed. Should the defendant be found guilty of first-degree murder by the jury, then in such event the court will be required to conduct a separate sentencing hearing before the trial jury to determine whether the defendant shall be sentenced to death or life imprisonment. It would be your duty to, after such sentencing hearing, recommend to the court whether the [102]*102defendant shall be sentenced to death or life imprisonment. Such a recommendation would be binding upon the court and that would be the sentence of the court. Before that time should occur, however, the sole responsibility of the trial jury is to determine from the evidence, beyond a reasonable doubt, that being the burden upon the State, whether the defendant is guilty of first degree murder or some lesser included offense about which the jury may be instructed, or not guilty.
(Emphasis added.) The defendant argues that this statement was inaccurate as it assumed that evidence of aggravating circumstances would be presented and a sentencing hearing required.
Although N.C.G.S. 15A-2000(a)(l) states that upon the adjudication of guilt of a capital felony, the trial court “shall” conduct a separate sentencing hearing, the trial court is not required to hold a separate sentencing hearing if it is clear that no evidence of aggravating circumstances has been or will be introduced. State v. Johnson, 298 N.C. 47, 257 S.E. 2d 597 (1979). In such cases the trial court may proceed to pronounce a sentence of life imprisonment without the intervention of the jury. Id.
The defendant has not shown how the statement of the trial court complained of in any way prejudiced him. The statement by the trial court merely had the effect of informing potential jurors that the jury’s function might involve both a determination of guilt or innocence and a determination of the appropriate sentence. Since a sentencing hearing in fact was required, it is clear that the statement complained of did not prejudice the defendant. It is apparent that counsel for the defendant did not think the substance of this statement by the trial court harmful to his client, since he made almost identical statements to certain prospective jurors during the selection of the jury. The defendant having failed to show any prejudice resulting from the trial court’s statement, his contentions concerning it are without merit and are rejected.
The defendant next contends that the trial court erred in excluding certain prospective jurors for cause as a result of answers they gave concerning their views on capital punishment. The defendant argues that the questions asked these prospective jurors by the prosecutor did not address the issue of whether the pro[103]*103spective jurors were irrevocably committed to vote against the penalty of death regardless of the evidence that might emerge in the course of the proceedings.
Although the prosecutor’s questions included the incorrect assumption that under current North Carolina law a verdict of guilty of murder in the first degree standing alone might result in the imposition of the death penalty, the trial court did not err in excusing the prospective jurors for cause. The transcript of the jury voir dire reveals that each juror excused for cause as a result of his or her views on capital punishment clearly indicated that he or she would automatically vote against the imposition of capital punishment without regard to any evidence that might be developed in the present case. Therefore, the trial court properly excused these jurors for cause. Witherspoon v. Illinois, 391 U.S. 510, 522-23, n. 21 (1968); N.C.G.S. 15A-1212(8).
The defendant next contends that the trial court erred by preventing counsel for the defendant from discussing the meaning of a bill of indictment during the voir dire examination of prospective jurors. The defendant attempted several times to inform prospective jurors about the significance of a bill of indictment. Each time the trial court sustained the State’s objection.
It is well established that the extent of the inquiry of a prospective juror rests within the trial court’s discretion and will not be found to be reversible error unless an abuse of discretion is shown. State v. Phillips, 300 N.C. 678, 268 S.E. 2d 452 (1980). The defendant in the present case has failed to discuss with any specificity how he contends he was prejudiced by the trial court’s rulings or how the trial court abused its discretion in this regard. We do not perceive how the ruling by the trial court in any manner involved an abuse of its discretion or prejudice to the defendant. The statements by counsel for the defendant concerning the significance of bills of indictment were not questions designed to reveal bias or questions at all. Instead, they were efforts by counsel to instruct the jury concerning the legal significance of bills of indictment. It was well within the discretion of the trial court to prohibit such attempts by counsel to give instructions on the law to prospective jurors during the voir dire examination. The trial court did not err in doing so in this case.
[104]*104The defendant also contends that the trial court erred in refusing to permit the defendant to question prospective jurors concerning the positions leaders of their churches held on the death penalty. Each juror the defendant sought to question in this manner had previously indicated that he or she had no moral or religious scruples concerning the death penalty. Positions held by leaders of their churches would be remotely relevant at best for purposes of determining their fitness as jurors. The trial court did not abuse its discretion in the present case by refusing to allow such questions.
The defendant further contends that the trial court erred in sustaining an objection to his question to a prospective juror as to whether she had previously had any occasion to discuss her views on the death penalty. The question was repetitious, since the prospective juror had already given a negative answer. The trial court did not abuse its discretion or commit error by preventing repetitious questions to prospective jurors.
The defendant next contends that the trial court erred by admitting into evidence two photographs which depict the area in the victim’s trailer where her body was found. The photographs, although gruesome, illustrate the testimony of Officer Richard G. Redding as to conditions at the crime scene when he arrived there shortly after the body was discovered. The fact that a photograph shows a horrible and gruesome scene does not render it incompetent. When properly authenticated, “photographs showing the condition of the body when found, its location when found, and the surrounding scene at the time the body was found are not rendered incompetent by the portrayal of gruesome events which the witness testifies they accurately portray.” State v. Elkerson, 304 N.C. 658, 665, 285 S.E. 2d 784, 789 (1982). This contention is without merit.
The defendant next contends the trial court erred by admitting into evidence items of clothing which allegedly belonged to the defendant. The defendant argues that his wife did not identify the items as the defendant’s with sufficient certainty to make them admissible.
It is axiomatic that any evidence calculated to throw any light upon the crime charged is admissible in criminal cases. State v. Hunt, 297 N.C. 258, 254 S.E. 2d 591 (1979); State v. Sledge, 297 [105]*105N.C. 227, 254 S.E. 2d 579 (1979). The objects of clothing in question were found in a plastic bag not far from the scene of the murder and were covered with blood of a type consistent with that of the victim. The relevancy and admissibility of these items of clothing is obvious.
The real thrust of the defendant’s arguments in support of his assignments and contentions concerning these items of clothing, however, seems to be that the defendant’s wife should not have been permitted to testify that the clothing belonged to him, because her identification of the clothing as his was not sufficiently certain. This argument is equally without merit.
As to two of the items of clothing, a shirt and a pair of trousers, the defendant’s wife could not have testified more clearly and unequivocally that they were the defendant’s. There was no error in the admission of her testimony in this regard.
As to the remaining clothing, a pair of brown cotton gloves, the defendant’s wife stated that: “David had a pair like that.” No objection or motion to strike this testimony was made at trial. Therefore, the defendant is deemed to have waived the right to raise this alleged error on appeal. State v. Oliver, 309 N.C. 326, 307 S.E. 2d 304 (1983). We will not review or consider assignments of error on appeal in such situations unless it is shown that the trial court committed “plain error” within the meaning of State v. Black, 308 N.C. 736, 303 S.E. 2d 804 (1983). Here, it is clear that the testimony of the defendant’s wife that he had a pair of gloves “like” those which had been introduced into evidence did not amount to “plain error.” See State v. Bass, 280 N.C. 435, 186 S.E. 2d 384 (1972) (testimony that a jacket introduced into evidence was “similar” to one worn by the defendant held admissible).
The defendant next contends that the trial court’s admission into evidence of the opinion testimony of forensic serologist Brenda Bissette was error. After being properly qualified as an expert in the field of forensic serology, Ms. Bissette testified that based on the results of ten blood tests performed at the S.B.I. laboratory, her opinion was that the blood found on the clothing identified as the defendant’s was consistent with the blood of the victim. She further stated that six-tenths of one percent of the population of the United States is known to share the characteris[106]*106tics of the victim’s blood. On cross-examination the serologist testified that although she had personally performed the test yielding the blood grouping, another individual in the S.B.I. lab performed tests requiring a process called electrophoreses. She stated that she could interpret and visually scan those tests results and determine that the electrophoreses tests had been properly conducted.
The defendant objected to the opinion testimony on grounds that the expert had not actually conducted some of the tests. The defendant contends that because he could not cross-examine the person who actually performed some of the tests, he was deprived of the right to confront his accusers guaranteed by the Sixth Amendment to the Constitution of the United States.
It has been held traditionally that an expert’s opinion is not admissible if based on hearsay evidence. Cogdill v. North Carolina State Highway Commission, 279 N.C. 313, 182 S.E. 2d 373 (1971). That general rule has undergone significant modification in recent years, especially in the area of expert medical testimony. See generally Blakey, Examination of Expert Witnesses in North Carolina, 61 N.C. L. Rev. 2 (1982); 1 Brandis on North Carolina Evidence, § 136 notes 23 to 27 (2d rev. ed. 1982).
In State v. DeGregory, 285 N.C. 122, 203 S.E. 2d 794 (1974) this Court held admissible a psychiatrist’s opinion based in part on information compiled in hospital records. The Court, through Justice Huskins, stated that “an expert witness has wide latitude in gathering information and may base his opinion on evidence not otherwise admissible.” Id. at 132, 203 S.E. 2d at 801. In State v. Wade, 296 N.C. 454, 251 S.E. 2d 407 (1979), this Court stated:
(1) A physician, as an expert witness, may give his opinion, including a diagnosis, based either on personal knowledge or observation or on information supplied him by others, including the patient, if such information is inherently reliable even though it is not independently admissible into evidence. The opinion, of course, may be based on information gained in both ways. (2) If his opinion is admissible the expert may testify to the information he relied on in forming it for the purpose of showing the basis of his opinion.
[107]*107296 N.C. at 462, 251 S.E. 2d at 412. (Emphasis added.) Further, we have held that testimony as to information relied upon by an expert when offered to show the basis for the expert’s opinion is not hearsay, since it is not offered as substantive evidence. State v. Wood, 306 N.C. 510, 294 S.E. 2d 310 (1982). Such evidence is admissible due to the limited purpose for which it is offered and not due to an exception to the hearsay rule. Id.
In general, the admission of “inherently reliable” information to show the basis for an expert’s opinion has occurred in cases involving medical or psychiatric experts. See, e.g. State v. Jackson, 302 N.C. 101, 273 S.E. 2d 666 (1981) (psychiatrist based opinion on tests not personally administered by him); State v. Franks, 300 N.C. 1, 265 S.E. 2d 177 (1980) (psychiatrist’s opinion based on examination as well as patient’s statements); Booker v. Duke Medical Center, 297 N.C. 458, 256 S.E. 2d 189 (1979) (no error in allowing physician to testify based on medical history obtained from a treating physician and the patient). In at least two cases decided prior to the pronouncement of the inherent reliability rule in Wade, however, this Court upheld the admission of non-medical expert opinion based on information not otherwise admissible. In State v. Louchheim, 296 N.C. 314, 250 S.E. 2d 630, cert. denied, 444 U.S. 836 (1979), an expert in the field of accounting gave his opinion based on documents not in evidence. The auditor testified about where he got the documents, what the documents contained and how he used them. This Court found no error in the admission of the testimony. In State Highway Commission v. Conrad, 263 N.C. 394, 139 S.E. 2d 553 (1965) this Court found no error in the admission of an opinion of a real estate appraiser, even though the opinion was based on information not admissible as substantive evidence.
The rule permitting experts to testify to opinions they have formed based on information not itself admissible as substantive evidence is not limited to opinions of physicians and other medical experts. Under the standard set forth in Wade, the standard applicable to this case, the tests forming the basis of the serologist’s testimony are sufficiently reliable to support the admission of her expert opinion based upon those tests.
We note here that, effective July 1, 1984, N.C.G.S. 8C-1, Rule 703 provides that:
[108]*108The facts or data in the particular case upon which an expert bases an opinion or inference may be those perceived by or made known to him at or before the hearing. If of a type reasonably relied upon by experts in the particular field in forming opinions or inferences upon the subject, the facts or data need not be admissible in evidence.
(Emphasis added.) Several commentators have suggested that there is little difference in the “inherently reliable” standard adopted by this Court in Wade and the “reasonably relied upon” standard of the new rule. See Blakey, Examination of Expert Witnesses in North Carolina, 61 N.C. L. Rev. 2, 26-27 (1982); 1 Brandis on North Carolina Evidence, § 136 (2d rev. ed. Supp. 1983). It is also clear that the new rule is not confined in its application to medical and psychiatric expert testimony.
The admission into evidence of expert opinion based upon information not itself admissible into evidence does not violate the Sixth Amendment guarantee of the right of an accused to confront his accusers where the expert is available for cross-examination. U.S. v. Williams, 447 F. 2d 1285 (5th Cir. 1971) (en banc), cert. denied, 405 U.S. 954, reh. denied, 405 U.S. 1048 (1972). Cf. U.S. v. Lawson, 653 F. 2d 299 (7th Cir. 1981) (where it was recognized that the introduction of expert testimony based largely on hearsay may create constitutional problems if there is no adequate opportunity to cross-examine the expert and the defendant does not have access to the information relied upon by the witness), cert. denied, 454 U.S. 1150 (1982). In such cases the defendant will have the right to fully cross-examine the expert witness who testifies against him. He will be free to vigorously cross-examine the expert witness, as did the defendant in the present case, concerning the procedures followed in gathering information and the reliability of information upon which the expert relies in forming his opinion. The jury will have plenary opportunity, as did the jury in this case, to understand the basis for the expert’s opinion and to determine whether that opinion should be found credible. The opportunity to fully cross-examine the expert witness testifying against him will insure, as in the present case, that the defendant’s right to confront and cross-examine his accusers guaranteed by the Sixth Amendment is not denied. The trial court did not err in admitting the expert testimony complained of here.
[109]*109The defendant next contends that the trial court erred when it denied his motions to dismiss at the close of the State’s case and at the close of all of the evidence. He argues that the State did not offer sufficient evidence of premeditation and deliberation to permit submission of the charge of first degree murder to the jury.
Before the question of a defendant’s guilt may be submitted to the jury for its consideration, the trial court must find that substantial evidence has been introduced tending to prove each essential element of the offense charged and that the defendant was the perpetrator. State v. Powell, 299 N.C. 95, 261 S.E. 2d 114 (1980). Substantial evidence must be existing and real but need not exclude every reasonable hypothesis of innocence. State v. Williams, 308 N.C. 47, 301 S.E. 2d 335 (1983), cert denied, — U.S. —, 78 L.Ed. 2d 177 (1983). The evidence must be viewed in the light most favorable to the State. The State is entitled to every reasonable intendment and inference to be drawn therefrom. Contradictions and discrepancies are for the jury to resolve and do not warrant dismissal. State v. Powell, 299 N.C. 95, 261 S.E. 2d 114 (1980).
First degree murder is the intentional and unlawful killing of a human being with malice and with premeditation and deliberation. N.C.G.S. 14-17. State v. Fleming, 296 N.C. 559, 251 S.E. 2d 430 (1979). Premeditation has been defined as thought beforehand for some length of time however short. State v. Biggs, 292 N.C. 328, 233 S.E. 2d 512 (1977). No particular amount of time is required for premeditation. State v. Myers, 299 N.C. 671, 263 S.E. 2d 768 (1980). Deliberation is an intention to kill executed in a cool state of blood in furtherance of a fixed design, to gratify a feeling of revenge or to accomplish some unlawful purpose and not under the influence of a violent passion suddenly aroused by some lawful or justifiable cause. Id.
Since premeditation and deliberation are processes of the mind, they are not ordinarily subject to direct proof but generally must be proved if at all by circumstantial evidence. State v. Buchanan, 287 N.C. 408, 215 S.E. 2d 80 (1975). Among other circumstances which will tend to show that a killing was with premeditation and deliberation are: (1) want of provocation on the part of the deceased; (2) the conduct and statements of the de[110]*110fendant before and after the killing; (3) threats and declarations of the defendant before and during the course of the occurrence giving rise to the death of the deceased; (4) ill-will or previous difficulty between the parties; (5) the dealing of lethal blows after the deceased has been felled and rendered helpless; and (6) evidence that the killing was done in a brutal manner. State v. Williams, 308 N.C. 47, 69, 301 S.E. 2d 335, 349, cert. denied, — U.S. --,78 L.Ed. 2d 177 (1983).
The evidence in the present case shows the extremely brutal slaying of a sixty-five year old woman in her home. Mrs. Powell died as a result of numerous wounds to her face, head, neck and shoulders inflicted over a period of some time. There is substantial evidence from which it is reasonable to infer that many of the blows were inflicted after the deceased had been felled and rendered helpless. There is no evidence of provocation on the part of the deceased. The removal of the telephone from its socket is further evidence tending to support an inference of premeditation or deliberation.
The evidence in support of premeditation and deliberation justified submission of the charge of first degree murder to the jury. The defendant’s contention is without merit.
The defendant next contends that prejudicial error occurred during the prosecutor’s closing argument before the jury. The defendant argues that the prosecutor’s comments constituted improper references to the defendant’s decision not to testify during the guilt-innocence phase of his trial. During the closing arguments the attorney for the defendant argued as follows:
Now, of course, when a defendant is accused of a crime and he is brought to trial, if the State — if the defendant does not present any evidence the defendant doesn’t present any evidence, then his counsel has the right of the opening argument, just as I am doing now, and closing argument. That is, Mr. Hill will argue to you after I’m finished here. Then Mr. Clark will argue to you, a closing argument for the defendant. The defense argues this is a very important argument and certainly something the defendant considers when he decides not to present any evidence.
[111]*111When the State’s turn to present an argument came, the prosecutor argued:
Mr. Harris, when he opened his argument to you, gave to you some reasons that he made up, but yet you haven’t heard any evidence as to why. That he must have a great value on his, he and Mr. Clark’s, ability to stand before you and orate, make a great moving speech which will outweigh the evidence you heard last week in this trial. It’s just pure vanity, ladies and gentlemen. This is not a game, as he indicated to you. When you came to sit as a juror in this case, it was said to you individually and you heard us repeat it to other jurors, that you could consider in your deliberations only that evidence that you hear here in the courtroom, and the only evidence that you heard was the evidence presented by the State. It would seem to me a rather vain thing on behalf of Mr. Harris and Mr. Clark to get up and to argue to you that the reason that they did not offer evidence was so that they could have the final argument. I don’t think — believe—that you’re such short-minded people —
Mr. HARRIS: Objection.
THE COURT: Overruled.
Mr. HILL: —that you can’t remember thirty minutes what occurred and they can talk to you and explain the evidence that they contend is consistent with his innocence. Ladies and gentlemen, there is no evidence that you heard in this case that is consistent with his innocence. No reasonable theory that is consistent with his innocence.
Arguments of counsel are largely in the control and discretion of the trial court. The appellate courts ordinarily will not review the exercise of that discretion unless the impropriety of counsel’s remarks is extreme and is clearly calculated to prejudice the jury. State v. Taylor, 289 N.C. 223, 221 S.E. 2d 359 (1976). Nonetheless, N.C.G.S. 8-54 has been interpreted as prohibiting comment on a defendant’s failure to testify. State v. Taylor, 289 N.C. 223, 221 S.E. 2d 359 (1976).
Having reviewed the arguments of both parties, we hold that the argument of the prosecutor did not improperly refer to the defendant’s failure to testify. The prosecutor argued that “there [112]*112is no evidence that you heard in this case that is consistent with [the defendant’s] innocence.” This Court has held that the State properly may bring to the jury’s attention a failure to produce exculpatory evidence, since exculpatory evidence need not come solely from a defendant’s testimony. State v. Foust, 311 N.C. 351, 317 S.E. 2d 385 (1984); State v. Smith, 290 N.C. 148, 226 S.E. 2d 10, cert. denied, 429 U.S. 932 (1976). The prosecutor’s comments in this regard did not go beyond direct rebuttal of the argument made previously by the defense attorney. Any impropriety was invited by the defense attorney’s suggestion that one of the factors in the defendant’s decision not to present evidence was the importance of the final argument. See State v. Moose, 310 N.C. 482, 313 S.E. 2d 507 (1984); State v. McCall, 289 N.C. 512, 223 S.E. 2d 303, vacated in part, 429 U.S. 912 (1976). We also note that the defense attorneys in their arguments as well as the trial court in its instructions, reminded the jury that the defendant’s silence created no presumption against him and should not be considered in any way.
The defendant also contends that another argument made by the prosecutor was prejudicial error. The defendant’s contention centers on the prosecutor’s argument that the defendant “didn’t have the common decency to leave Alice Cantrell long enough to bury his mother-in-law.”
As we have stated, counsel will be allowed wide latitude in the argument of hotly contested cases. State v. McKenna, 289 N.C. 668, 224 S.E. 2d 537, death sentence vacated on other grounds, 429 U.S. 912 (1976). Counsel for each side may argue to the jury the facts in evidence and all reasonable inferences to be drawn therefrom together with the relevant law so as to present his or her side of the case. State v. Taylor, 289 N.C. 223, 221 S.E. 2d 359 (1976). Decisions as to whether an advocate has abused this privilege must be left largely to the sound discretion of the trial court.
The trial court in this instance acted within the bounds of its sound discretion in allowing the contested argument. Alice Cantrell’s testimony was that at approximately 10:00 a.m. on the day of the murder, the defendant came to be with her. The two stayed together constantly from that time until the defendant’s arrest two days later. The prosecutor’s remarks, although touching upon [113]*113matters not directly testified to, were reasonable inferences based on the evidence and were within the wide latitude properly afforded counsel in argument. Id. The trial court did not err in the manner in which it controlled the arguments of counsel. The defendant’s contentions in this regard are without merit.
The defendant next contends that the trial court erred in its final instructions to the jury during the guilt-innocence phase of the trial. The defendant’s contention is that the court erred in failing to mention that a sentencing hearing would be held only if there was evidence of an aggravating circumstance. The defendant did not object to the instructions. Where a defendant fails to object to jury instructions prior to the jury’s retiring, our review is limited to examining the record for “plain error” or error so fundamental or prejudicial that justice cannot have been done. State v. Oliver, 309 N.C. 326, 307 S.E. 2d 304 (1983). Because this is a capital case, however, we have reviewed thoroughly the trial court’s instructions. We find no error. As we stated in our discussion of the trial court’s remarks to jury veniremen during voir dire examination, a sentencing hearing in fact was required and held in the present case. The defendant has failed to show any prejudice caused by the trial court’s action in this regard, and his contention is without merit.
The defendant next argues that the trial court committed prejudicial error during the guilt-innocence phase of the trial when it allowed the jury to take photographs which had been admitted into evidence to the jury room over the defendant’s objection. After retiring to deliberate in the guilt-innocence phase of the trial, the jury returned and requested “the pictures of the trailers” and a repetition of the definitions of first and second degree murder. The trial court repeated the requested instructions and ordered that the requested photographs be sent to the jury room. The defendant made a timely objection.
Exhibits 6, 8, 9, 10, 14 and 20 were sent to the jury room. Exhibits 6, 8 and 20 were outdoor photographs showing, respectively, the place where a plastic bag containing clothing was found, the trailers inhabited by the defendant and the victim, and the thicket where parts of the metal skillet were found. Exhibits 9, 10 and 14 were photographs which showed, respectively, the overall view of the interior of the victim’s trailer and the location of the [114]*114body, a metal fragment found on the floor, and the false teeth found near the body.
The defendant cites N.C.G.S. 15A-1233(b) for his argument that the trial court erred in allowing the jury to take the pictures into the jury room over his objection. That statute provides:
(b) Upon request by the jury and with consent of all parties, the judge may in his discretion permit the jury to take to the jury room exhibits and writings which have been received in evidence. If the judge permits the jury to take to the jury room requested exhibits and writings, he may have the jury take additional material or first review other evidence relating to the same issue so as not to give undue prominence to the exhibits or writings taken to the jury room. If the judge permits an exhibit to be taken to the jury room, he must, upon request, instruct the jury not to conduct any experiments with the exhibit.
(Emphasis added.) In dicta, this Court in State v. Barnett, 307 N.C. 608, 300 S.E. 2d 340 (1983), interpreted the statute to mean that the consent of all parties is required before the jury may take evidence to the jury room. The Court of Appeals has similarly interpreted the statute and held it to be error to allow the jury to take evidence into the jury room over a party’s objection. State v. Taylor, 56 N.C. App. 113, 287 S.E. 2d 129 (1982); State v. Prince, 49 N.C. App. 145, 270 S.E. 2d 521 (1980); State v. Bell, 48 N.C. App. 356, 269 S.E. 2d 201, disc. rev. denied, 301 N.C. 528, 273 S.E. 2d 455 (1980). We hold that the trial court erred in allowing the jury to take these photographs to the jury room without the consent of all parties. Therefore, our inquiry must turn to whether the error was prejudicial. Id.
Under N.C.G.S. 15A-1443(a), a defendant is prejudiced by errors relating to rights arising other than under the Constitution of the United States only when “there is a reasonable possibility that, had the error in question not been committed, a different result would have been reached at the trial out of which the appeal arises. The burden of showing such prejudice under this subsection is upon the defendant.” We are not persuaded that the defendant has met his burden of showing such prejudice.
[115]*115The photographs in question had been previously admitted into evidence and shown to the jury to illustrate the testimony of a law enforcement officer. Furthermore, the trial court had the discretion under N.C.G.S. 15A-1232(a) to permit the jury to reexamine the pictures closely and at length in the courtroom. Other evidence introduced during the guilt-innocence phase of the trial linking the murder with the defendant was circumstantial, but compelling. The defendant has not shown a reasonable possibility that had this error not been committed a different result would have been reached. See State v. Taylor, 56 N.C. App. 113, 287 S.E. 2d 129 (1982) (no prejudice shown where, over objection, jury while deliberating viewed photographs which had already been admitted into evidence). This contention is without merit.
Sentencing Phase
The defendant contends that the trial court erred during the sentencing phase in this case by submitting for the jury’s consideration as an aggravating circumstance that the killing was especially heinous, atrocious or cruel. N.C.G.S. 15A-2000(e)(9). It is the defendant’s contention that this aggravating circumstance could not be submitted to the jury because the State offered no evidence as to whether the victim was alive or conscious during any substantial portion of the assault. We do not agree.
In State v. Oliver, 309 N.C. 326, 307 S.E. 2d 304 (1983), we declined to limit the definition of an especially heinous, atrocious or cruel murder to include only those which involve physical injury or torture prior to death. In State v. Brown, 306 N.C. 151, 293 S.E. 2d 569, cert. denied, 459 U.S. 1080 (1982), we upheld the submission of this aggravating circumstance even though the evidence did not establish at what point during a brutal attack the victim’s death occurred. See also State v. Johnson, 298 N.C. 47, 257 S.E. 2d 597 (1979) (aggravating circumstance properly submitted although victim rendered unconscious before she was raped and stabbed to death). We hold that the evidence presented by the State in the present case was sufficient to permit the jury to consider whether the murder of Edna Powell was “especially heinous, atrocious or cruel.” Edna Powell died as a result of being battered to death by what can only have been a prolonged series of blows, blows with a cast-iron skillet so severe as to fracture her skull, neck, jaws, and collarbone and to cause her skull to be [116]*116pushed into her brain. The severity and the brutality of the numerous wounds inflicted amply justified submission of this aggravating circumstance to the jury.
The defendant next contends that the trial court erred in the sentencing hearing in refusing to permit the defendant’s sister to testify to his nonviolent nature. This contention is without merit. Even if it is assumed arguendo that it was error to exclude this testimony, the error was harmless beyond all doubt. Both the defendant’s mother and his wife testified that the defendant was not violent. His sister’s testimony would have been repetitive. More significantly, the jury was convinced by the evidence admitted and found the defendant’s nonviolent past to be a mitigating circumstance.
The defendant also contends that the trial court erred by its refusal to charge the jury that it could find as a mitigating circumstance: “That during the sentencing phase, the defendant testified under oath and admitted his role in the victim’s death. That this admission of wrongdoing reflects a potential for rehabilitation.” In State v. Pinch, 306 N.C. 1, 292 S.E. 2d 203 (1982) we held that a defendant demonstrates reversible error in the trial court’s omission of timely requested mitigating circumstances only if he establishes three things: (1) that the factor is one the jury could have reasonably deemed to have mitigating value; (2) that there is sufficient evidence of the existence of the factor; and (3) that considering the case as a whole, the exclusion of the factor resulted in ascertainable prejudice. We find no error here.
The defendant maintains that his testimony during the sentencing phase is evidence of a first step toward his rehabilitation. A review of the defendant’s testimony and the evidence presented in the sentencing hearing does not support this view. The defendant’s testimony, though a confession of guilt, came only after a jury had convicted him of first degree murder and was deciding between a life sentence and the death penalty. Much of his testimony sought to limit his personal responsibility by showing that drugs and alcohol played a part in his killing of his mother-in-law. The defendant indicated during his testimony that he had wanted to keep quiet during the sentencing hearing but that his wife and family wanted him to tell the truth. The evidence was not sufficient to require the submission of the re[117]*117quested mitigating circumstance to the jury. See State v. Craig, 308 N.C. 446, 302 S.E. 2d 740, cert. denied, --- U.S. ---, 78 L.Ed. 2d 247 (1983) (failure to submit as a mitigating circumstance the defendant’s willingness to take a polygraph test was not error since it was self-serving and did not show willingness to cooperate with the police). We hold that the trial court properly refused to submit the requested mitigating circumstance for consideration.
Statutory Review of Sentence By Supreme Court
Having found no prejudicial error by the trial court during either the guilt-innocence or sentencing phases of the trial, we turn to the duties reserved by statute exclusively for this Court in reviewing the judgment and sentence of death. Under N.C.G.S. 15A-2000(d)(2) we must determine whether the record supports a finding of the aggravating circumstance on which the sentencing court based its sentence of death; whether the sentence was imposed under the influence of passion, prejudice or any other arbitrary factor; and whether the sentence is excessive or disproportionate to the penalty imposed in similar cases, considering both the crime and the defendant.
We have thoroughly examined the record, transcripts and briefs in this case. As stated previously, we find the record supports the submission of the aggravating circumstance which was considered and found by the jury. Further, we find no indication at all that the death penalty was imposed under the influence of passion, prejudice or arbitrary factors.
We turn then to our final statutory duty of proportionality review. This duty requires us to determine whether the sentence of death in this case is excessive or disproportionate to the penalty imposed in similar cases, considering both the crime and the defendant. For purposes of proportionality review, we use all of the cases in the “pool” of similar cases announced in State v. Williams, 308 N.C. 47, 301 S.E. 2d 335, cert. denied, — U.S. —, 78 L.Ed. 2d 177 (1983).
Having compared the crime and the defendant in this case to those in the pool of similar cases, we do not find the sentence of death entered here to be disproportionate. The evidence presented at trial supports the view that the sixty-five year old female [118]*118victim was brutally beaten to death during a prolonged attack in her own home. The defendant struck the victim with a cast-iron skillet at least fourteen times, breaking her jaws, collarbone and spine and fracturing her skull in several places. The deceased was struck repeatedly with enough force to spatter blood throughout the room in which she was killed. The blows struck were with sufficient force to push a portion of the victim’s skull into her brain and expose brain tissue.
No evidence was introduced tending to show that the victim made any threat or assaulted the defendant in any way before he beat her to death with the skillet. The defendant himself testified that he was not angry at the time he beat the victim to death.
After beating the victim, the defendant went to his trailer next door to change his bloody clothes. He put on a pair of gloves before returning to the scene so that he would leave no fingerprints. After disposing of his clothes and the skillet he used as the murder weapon, the defendant left the victim on the floor in a pool of her own blood and went to visit a woman with whom he had previously engaged in shoplifting. He spent the night of the murder in a motel with this woman and stayed with her until his arrest two days later.
Thus, the record before us reveals a senseless, unprovoked, exceptionally brutal, prolonged and murderous assault by an adult male upon a sixty-five year old female in her home. Having compared the defendant and the crime in this case to others in the pool of similar cases, we conclude that the sentence of death entered by the trial court is not disproportionate.
We hold that no prejudicial error was committed in either the guilt-innocence phase or the sentencing phase of the trial and that the sentence of death entered by the trial court was not disproportionate. Further, we hold that this is not a proper case in which to exercise our statutory authority to set aside the sentence of death. We leave the sentence of death undisturbed.
No error.