KELLY, Judge.
Appellant, Richard Flood, appeals from the judgment of sentence reinstated on January 10, 1991 following the trial court’s denial of his motion to withdraw his December 7, 1990 guilty plea to first degree murder1 and possession of an instrument of crime.2 Appellant contends that the trial court erred in denying his motion to withdraw his plea. We hold that appellant’s contention is without merit and, therefore, affirm.
The relevant facts and procedural history may be summarized as follows. Appellant was charged with first degree murder and possession of an instrument of crime in connection with the shooting death of sixteen-year-old Jose Perez which occurred on the evening of March 15, 1989. Prior to the shooting, a group of about ten males crossed the street and one of them poured beer on the car of Luis Centrone as he was driving at 9th and Lycoming Streets in Philadelphia, Pennsylvania, on his way to visit a friend in the area. Centrone remained in his car and drove on to Delhi Street, where he told a friend about the incident. They obtained baseball bats and recruited friends to return with them to comb the area, looking for the person who poured the beer. As they were leaving the area of the incident in two cars, Jose Perez followed them into the area of 9th and Pike Streets driving an [561]*561all-terrain vehicle. Centrone and his friends heard gunshots and kept going without realizing that Perez had been shot. Later, Centrone and his Mends discovered bullet holes in both of their cars.
Police found Perez at Delhi and Pike Streets at about 7:30 p.m. with a bullet hole in his lower back. Perez died at Temple University Hospital at 2:10 a.m., March 16, 1989, of a gunshot wound which severed a major artery.
Two members of the local town watch heard the shots and observed two men running, then stopping, then pushing something into their pockets. One of the men wore a distinctive red and black jacket. The police were informed of these observations. Shortly after arriving in the area, police saw appellant, emerging from an alley, wearing a distinctive red and black jacket, with what appeared to be a gun in his hand. Upon further police investigation, appellant was discovered kneeling between two parked cars, sweating and wearing a distinctive jacket which matched the description given police by the town watch members. A pat down revealed no weapon. Appellant denied coming from the alley. At a point very close3 to where appellant was apprehended, the police discovered a gun which later proved to be the weapon used to kill Perez. The two town watch members identified appellant’s jacket as identical to the jacket worn by the person they had witnessed running from the scene of the shooting.
The matter was tried before a death qualified jury, as the Commonwealth was seeking the death penalty. The trial extended from November 30, 1990' to December 6, 1990. Appellant testified on his own behalf that he had been playing basketball earlier in the evening of the fatal shooting and was coming from a friend’s house located at 9th and Pike Streets. According to his testimony, appellant claimed that he was on his way home when he heard gunfire and saw someone running out of an alley, whereupon appellant went into the [562]*562alley and picked up a discarded gun which he intended to sell because he was unemployed. When appellant saw the police, he dropped the gun, according to his testimony, because he was on bail in another criminal matter.
At the conclusion of defense counsel’s closing argument, the Commonwealth moved to reopen the trial because the prosecution had acquired additional information which would rebut appellant’s alibi. The Commonwealth offered a facsimile of a statement obtained by military personnel from Gregory A. Brunson, Jr. In his affidavit, Brunson stated that he had purchased a gun for appellant at appellant’s behest. Brunson and appellant are cousins. The purchased gun was the weapon that killed Jose Perez.
Appellant and defense counsel then met to discuss the potential impact of this new evidence and the terms of a plea bargain as well. The Commonwealth agreed to refrain from seeking the death penalty if appellant would plead guilty to the charges. On December 7,1990, appellant entered a guilty plea and submitted to written and oral colloquies after which the trial court accepted his plea and immediately sentenced appellant to life imprisonment for the murder charge plus a concurrent one to two years for the possession of an instrument of crime charge.
On December 12, 1990, appellant moved to withdraw his negotiated guilty plea at which point the trial court vacated the sentence pending disposition of appellant’s petition. On January 10, 1990, appellant petitioned the court for appointment of new counsel. Following a hearing on that date, the trial court denied appellant’s motion to withdraw his plea and re-imposed sentence. The trial court permitted trial counsel to withdraw representation. New counsel was appointed for the purposes of this timely appeal.
Appellant raises the following issues for our review:
1. DID THE HONORABLE JOHN J. POSERINA, JR. ERR IN OPENING THE TRIAL RECORD AFTER THE CLOSING SPEECH OF TRIAL COUNSEL ON THE BASIS OF ALLOWING THE PROSECUTION [563]*563TO PRESENT ADDITIONAL EVIDENCE AND WAS TRIAL COUNSEL INEFFECTIVE FOR NOT POINTING OUT THE ADDITIONAL EVIDENCE WAS CONTAINED IN A STATEMENT, DATED NOVEMBER 6, 1990, WHICH SHOULD HAVE BEEN KNOWN WELL IN ADVANCE OF THE TRIAL AND FOR NOT INVESTIGATING THE ACCURACY OF THE CONTENTS AND WAS MR. FLOOD’S SUBSEQUENT PLEA THE RESULT OF COERCION AND NOT VOLUNTARILY ENTERED?
2. DID THE HONORABLE JOHN J. POSERINA, JR. ERR IN NOT ALLOWING MR. FLOOD TO WITHDRAW HIS GUILTY PLEA AND HAVE INDEPENDENT COUNSEL AT THE HEARING, SINCE HIS TRIAL COUNSEL WAS INEFFECTIVE FOR NOT NOTING THE NEW EVIDENCE HAD A DATE PRIOR TO TRIAL, FOR NOT INVESTIGATING THE NEW EVIDENCE, AND FOR COUNSELING MR. FLOOD TO ENTER HIS PLEA WITHOUT PROPER INVESTIGATION?
3. DOES THIS COURT LACK JURISDICTION SINCE THE HONORABLE JOHN P. POSERINA, JR. FAILED TO RESENTENCE MR. FLOOD?
Appellant’s Brief at 3.
As a threshold matter, appellant questions this Court’s jurisdiction to hear his appeal because, according to appellant, the trial court failed to resentence him after denying his motion to withdraw his guilty plea. We disagree.
Rule 301 of the Pennsylvania Rules of Appellate Procedure states that no order of a court shall be appealable until it is entered upon the appropriate docket and set forth on a separate document. Pa.R.App.P. 301(a), (b). The separate document requirement, however, is a waivable defect where the trial court clearly intends its opinion to represent the court’s final decision in the case and the appellee does not object to the taking of the appeal in the absence of a separate judgment. Mitchum v. Atlantic Richfield Co., 364 Pa.Super. [564]*564588, 586, 528 A.2d 662, 663 (1987); Brandschain v. Lieberman, 320 Pa.Super. 10, 11 n. 1, 466 A.2d 1035, 1036 n. 1 (1983); Parents Against Abuse In Schools v. The Williamsport Area School District, 140 Pa.Cmwlth. 559, 567, 594 A.2d 796, 800 (1991).
Instantly, there are docket entries verifying the reimposition of appellant’s sentence. Moreover, the charge sheets accompanying the January 10, 1991 proceeding, which are included in the quarter sessions file, state that the sentences imposed on December 7, 1990 and vacated on December 12, 1990 were reimposed by the court. Additionally, the trial court opinion emphasizes the reimposition of sentence as its final decision in the case. Trial Court Opinion at 5. Thus, appellant’s jurisdiction argument is wholly without merit.4
Appellant asserts that the trial court erred in denying his petition to withdraw his guilty plea after sentencing. Appellant contends that his guilty plea was involuntary due to trial court error and the ineffectiveness of his trial counsel. Specifically, appellant alleges that the trial court erred in allowing the prosecution to reopen its case to offer rebuttal testimony in the form of an incriminating affidavit submitted by appellant’s cousin. Moreover, appellant proffers that his trial counsel was ineffective for failing to object to the admissibility of the affidavit and failing to request a continuance to investigate the accuracy of this new evidence. Accordingly, appellant concludes, his guilty plea was involuntarily induced and the trial court should have permitted him to withdraw it. We disagree.
In general, a guilty plea is a waiver of treasured rights, and to be valid, the plea must be knowing, intelligent and voluntary. Pa.R.Crim.P. 319; Commonwealth v. Sauter, [565]*565389 Pa.Super. 484, 567 A.2d 707 (1989), appeal denied, 525 Pa. 598, 575 A.2d 564 (1990). Moreover,
Pursuant to Pa.R.Crim.P. 319(a), a trial judge “shall not accept [a guilty plea] unless he determines after inquiry of the defendant that the plea is voluntarily and understandingly tendered. Such inquiry shall appear on the record.” Regarding the entry of a guilty plea, it has been said:
Pennsylvania has constructed its guilty plea procedures in a way designed to guarantee assurance that guilty pleas are voluntarily and understanding^ tendered. See: Pa. R.Crim.P. 319 and comment thereon. The entry of a guilty plea is a protracted and comprehensive proceeding wherein the court is obliged to make a specific determination after extensive colloquy on the record that a plea is voluntarily and understanding^ tendered. A guilty plea colloquy must include inquiry as to whether (1) the defendant understood the nature of the charge to which he is pleading guilty; (2) there is a factual basis for the plea; (3) the defendant understands that he has the right to a jury trial; (4) the defendant understands that he is presumed innocent until he is found guilty; (5) the defendant is aware as to the permissible range of sentences; and (6) the defendant is aware that the judge is not bound by the terms of any plea agreement unless he accepts such agreements. Commonwealth v. Willis, 471 Pa. 50, 369 A.2d 1189 (1977). Inquiry into these six areas is mandatory in every guilty plea colloquy. Commonwealth v. Glaze, 366 Pa.Super. 517, 531 A.2d 796 (1987); Commonwealth v. Moore, 365 Pa.Super. 65, 528 A.2d 1364 (1987). See also: Commonwealth v. Johnson, 355 Pa.Super. 123, 512 A.2d 1242 (1986).
Commonwealth v. McClendon, 403 Pa.Super. 467, 469-71, 589 A.2d 706, 707-08 (1991) (en banc), appeal denied, 528 Pa. 622, 597 A.2d 1151 (1991) (citing Commonwealth v. Cole, 387 Pa.Super. 328, 335-36, 564 A.2d 203, 206-07 (1989) (en banc)). The importance of the guilty plea colloquy is to provide a recorded demonstration that the plea was a voluntary and intelligent action entered with full awareness of its ramifica[566]*566tions. Commonwealth v. Iseley, 419 Pa.Super. 364, 377, 615 A.2d 408, 415 (1992) (citing Commonwealth v. Ingram, 455 Pa. 198, 200, 316 A.2d 77, 78 (1974)). While the Rule 319 checklist is a necessary part of the determination of the validity of a guilty plea, a full analysis must be based on the totality of the circumstances surrounding the plea. Commonwealth v. Iseley, supra 419 Pa.Super. at 377, 615 A.2d at 415 (citing Commonwealth v. Owens, 321 Pa.Super. 122, 131, 467 A.2d 1159, 1163 (1983)).
Instantly, the notes of testimony relating to the entry of appellant’s guilty plea reflect that the trial court made all of the appropriate inquiries pursuant to Pa.R.Crim.P. 319. Throughout the oral colloquy, appellant affirmed his knowledge and understanding of the charges against him, the factual basis thereof, his right to a jury trial, the presumption of innocence, and the possible sentence. Moreover, appellant twice affirmed the voluntariness of his plea. In addition, appellant tendered a written plea, duly signed by all the necessary parties, which was incorporated into the record. Appellant positively acknowledged his understanding that he was waiving all trial rights and defects, thereby limiting his grounds for appeal. Accordingly, the guilty plea colloquies reveal no irregularities, as they are in compliance with Pa. R.Crim.P. 319. Appellant’s guilty plea, therefore, is facially sound.
After an accused enters a guilty plea, appellate rights are limited to challenges to the validity of the plea, the legality of the sentence imposed, or the trial court’s jurisdiction. Commonwealth v. Harvey, 407 Pa.Super. 545, 548, 595 A.2d 1280, 1282 (1991), appeal denied, 530 Pa. 652, 608 A.2d 28 (1991); Commonwealth v. Moore, 365 Pa.Super. 65, 69, 528 A.2d 1364, 1366 (1987); Commonwealth v. Owens, supra. Although there is no absolute right to withdraw a guilty plea, withdrawal requests made prior to sentencing should be liberally granted. Commonwealth v. Turiano, 411 Pa.Super. 391, 406, 601 A.2d 846, 854 (1992), appeal denied, 531 Pa. 654, 613 A.2d 559 (1992); Commonwealth v. Harvey, supra. After sentencing, however, the accused must demonstrate prejudice [567]*567that results in manifest injustice in order to withdraw a guilty plea. Commonwealth v. Vance, 376 Pa.Super. 493, 499, 546 A.2d 632, 635 (1988), appeal denied, 521 Pa. 620, 557 A.2d 723 (1989). Proving manifest injustice requires the accused to show that the guilty plea was invalid, ie., involuntary or unknowing. Commonwealth v. Martin, 416 Pa.Super. 507, 611 A.2d 731 (1992); Commonwealth v. Harris, 403 Pa.Super. 435, 589 A.2d 264 (1991).
Because “a plea of guilty effectively waives all non-jurisdictional defects and defenses,” Commonwealth v. Gibson, 385 Pa.Super. 571, 561 A.2d 1240 (1989), appeal denied, 525 Pa. 642, 581 A.2d 568 (1990), after sentencing, allegations of ineffectiveness of counsel in this context provide a basis for withdrawal of the plea only where there is a causal nexus between counsel’s ineffectiveness, if any, and an unknowing or involuntary plea. Commonwealth v. Turiano, supra; Commonwealth v. Vance, supra. The guilty plea hearing becomes the significant procedure under scrutiny. Commonwealth v. Turiano, supra. The focus of the inquiry is whether the accused was misled or misinformed and acted under that misguided influence when entering the guilty plea. Commonwealth v. Broadwater, 330 Pa.Super. 234, 243, 479 A.2d 526, 531 (1984).
Here, appellant challenges his guilty plea by raising claims of error and counsel’s ineffectiveness at trial, not at the guilty plea proceeding. In the context of attacking the voluntariness of his guilty plea, appellant attempts to raise alleged trial defects which he waived by the very act of entering his plea. Appellant submits, however, that, but for these trial defects, he would not have pled guilty.
Under the unusual circumstances of this case, appellant had the benefit of a full jury trial wherein the Commonwealth was seeking the death penalty. The trial proceedings ceased when appellant negotiated and entered his guilty plea. As a result of his guilty plea, appellant received the benefit of his bargain, a life sentence. The facts adduced at trial were summarized and fully incorporated by reference at the guilty plea hearing, [568]*568along with the additional evidence of the affidavit given by appellant’s cousin. Appellant affirmed this factual basis, never contesting the truth of the affidavit until he petitioned to withdraw the guilty plea. At the January 10,1991 proceeding, appellant raised a question concerning a discrepancy in the dates on the affidavit.
The affidavit in question (exhibit B) is a one page document. At the top of the page appears the facsimile transmission date of December 6, 1990. In the upper right corner, in the affiant’s handwriting, is the date of November 6, 1990. At the bottom of the document, the notary’s certification is dated December 6, 1990. Appellant argues that trial counsel was ineffective for failing to note the “November 6, 1990” date, to object to the admissibility of the document as a discovery rule violation, and to request a continuance for the purpose of further investigation. The Commonwealth maintains, however, that the “November 6,1990” date is error and that the two “December 6, 1990” dates control. Because the affidavit constituted newly discovered evidence, it is the Commonwealth’s position that the trial court did not err in allowing the Commonwealth to reopen its case to rebut appellant’s testimony. Appellant submits no evidence of unlawful coercion other than these alleged trial defects which, we hold, he waived by entering a guilty plea.5 Assuming, for the sake of argument, [569]*569that these issues have been properly preserved, we hold that appellant’s underlying claims must necessarily fail.
The rights and duties of the parties in pretrial discovery in criminal cases are governed by Pa.R.Crim.P. 305.6 [570]*570Pursuant to this rule, the Commonwealth must comply with certain mandatory disclosure requirements. The prosecution does not violate discovery rules, however, where it does not provide the defense with evidence it does not possess and of which it is unaware during pretrial discovery. Commonwealth v. Chew, 338 Pa.Super. 472, 483, 487 A.2d 1379, 1385 (1985).
It is, moreover, within the trial court’s discretion to allow either side to reopen a case, prior to judgment, in order to prevent a failure or miscarriage of justice. Commonwealth v. Tharp, 525 Pa. 94, 575 A.2d 557 (1990); Commonwealth v. Ridgely, 243 Pa.Super. 397, 365 A.2d 1283 (1976). The admission or rejection of rebuttal evidence is within the trial court’s discretion as well. Commonwealth v. Feflie, 398 Pa.Super. 622, 581 A.2d 636 (1990), appeal denied, 528 Pa. 621, 597 A.2d 1151 (1991), citing Commonwealth v. Mathis, 317 Pa.Super. 362, 464 A.2d 362 (1983).
In reviewing challenges to counsel’s stewardship, counsel is presumed effective, and appellant bears the burden of proving his claim of ineffectiveness. Commonwealth v. McNeil 506 Pa. 607, 487 A.2d 802 (1985). To prevail on an ineffectiveness claim, appellant must demonstrate that his claim is of arguable merit, that counsel’s chosen course had no [571]*571reasonable basis designed to effectuate appellant’s interests, and that but for the arguably ineffective act or omission there is a reasonable probability that the result would have been different. Commonwealth v. Pierce 515 Pa. 153, 157-60, 527 A.2d 973, 975-76 (1987); Commonwealth v. Neal, 421 Pa.Super. 478, 482, 618 A.2d 438, 440 (1992). Finally, whether counsel’s investigative decisions are reasonable depends critically on the information supplied by the accused. Commonwealth v. Peterkin, 511 Pa. 299, 319, 513 A.2d 373, 383 (1986), citing Strickland v. Washington, 466 U.S. 668, 691, 104 S.Ct. 2052, 2066, 80 L.Ed.2d 674, 695-96 (1984), reh. denied, 467 U.S. 1267, 104 S.Ct. 3562, 82 L.Ed.2d 864 (1984).
On the record of this case, there is an absence of such manifest injustice which would require that the appellant be permitted to withdraw his guilty plea. The prosecution maintains that it was unable to present the affidavit at issue sooner than December 6, 1990 because that is the date on which it was first received from the military personnel where appellant’s cousin was stationed. The content of the affidavit was necessary to rebut appellant’s testimony that he found the gun and was going to sell it because he was unemployed. The trial court was persuaded that the “November 6, 1990” date was an error, in view of the transmission date and the notary’s subscription date which were both “December 6, 1990.” We conclude, therefore, that the trial court did not abuse its discretion in allowing the prosecution to reopen its case to submit this offer of proof in rebuttal.7
[572]*572Additionally, the truth of the affidavit was presumably known to appellant. Counsel was not ineffective for failing to investigate the accuracy of the statement which appellant already knew was either true or false. Appellant does, not assert that trial counsel knew appellant challenged the truth of his cousin’s statement, that counsel advised appellant that any challenge would be useless, or that there was a reasonable probability that the result would have been different but for the alleged ineffectiveness. Also, there is nothing of record to show that the trial court admitted this new evidence at trial, or that the jury ever heard the statement prior to appellant’s entry of a guilty plea.8 On the contrary, [573]*573when confronted with the new information, appellant chose to enter a guilty plea rather than attack the statement or allow the jury to hear it and risk the death penalty. Counsel cannot be deemed ineffective for advising the tactical decision to avoid a possible death penalty through a plea bargain. Such advice had a reasonable basis designed to effectuate appellant’s interests and does not invalidate a subsequent guilty plea. See Brady v. United States, 397 U.S. 742, 90 S.Ct. 1463, 25 L.Ed.2d 747 (1970) (holding that a plea of guilty which would not have been entered except for defendant’s desire to eliminate the possibility of a death penalty and to limit the maximum penalty to life imprisonment ... was not for that reason compelled ... for the purpose of determining the validity of a guilty plea). Under the circumstances of this case, the plea was to appellant’s advantage. Thus, counsel was not ineffective for advising in favor of the plea, absent some signal from appellant that the statement was false.9 We conclude, therefore, that appellant’s underlying claims of coercion or inducement, even if preserved, must necessarily fail.
In appellant’s final argument, he contends that he was entitled to new counsel at the hearing on his petition to withdraw his plea of guilty. The bases of this entitlement are [574]*574the same allegations of coercion or inducement raised in his second argument. Due to our independent analysis of appellant’s underlying claims, we conclude that appellant was not entitled to have independent counsel appointed to explore these issues at the withdrawal hearing.
Citing no rule of law in support of his contention, appellant relies instead on Commonwealth v. Watlington, 491 Pa. 241, 420 A.2d 431 (1980) wherein a majority of our Supreme Court held that the trial court erred in dismissing a second Post Conviction Hearing Act petition without a hearing and without the appointment of new counsel. In Watlington, petitioner raised claims of ineffective assistance of all prior counsel in his pro se petition for relief. The context of the' Watlington holding, however, is significantly different from the case at bar.
The issue in Watlington was whether petitioner’s claim of ineffective assistance of counsel had been waived for failure to raise it at the earliest stage in the proceedings at which counsel, whose effectiveness was being challenged, no longer represented the petitioner. The Court vacated the order denying petitioner relief, remanding the matter to the trial court with instructions to appoint counsel to represent the petitioner in the filing of an amended P.C.H.A. petition and any further proceedings thereon.
In the instant case, appellant entered his guilty plea following a full consideration of his options. Only after sentencing, where he received the benefit of his bargain, did appellant choose to raise his claims of trial error in an attempt to invalidate the plea. Waiver of any trial error resulted from the entry of the guilty plea which we have determined was knowing and voluntary. Nevertheless, the trial court held a hearing on appellant’s post-sentence request to withdraw his plea and appointed new counsel for this direct appeal. Appellant raised his ineffectiveness claims at the hearing, and we have addressed the merits of these claims on this appeal. Thus, appellant has had the benefit of a fall review of his claims. Therefore, we will not remand this matter for another hearing on the same issues.
[575]*575Based on the totality of the circumstances surrounding appellant’s guilty plea, we hold that the trial court did not err in refusing to allow him to withdraw his plea. Appellant has failed to demonstrate any unlawful coercion or inducement which would render his plea invalid. Thus, appellant has not established the manifest injustice which would entitle him to relief. Accordingly, we affirm judgment of sentence.
Judgment of sentence affirmed.
BECK, J., filed a concurring statement.