Opinion by
Judge GRAHAM.
Defendant, Leotis Durwin Greer, appeals the judgment of conviction entered on jury verdicts finding him guilty of one count of sexual assault on a child, one count of sexual assault as part of a pattern of sexual abuse, and five counts of unlawful sexual contact that the district court merged into one count. We reverse the judgment as to the merged counts of unlawful sexual contact, affirm in all other respects, and remand for further proceedings.
I. Background
Defendant was a manager at a fast-food restaurant where two teenage girls, S.D. and S.S., were employed. S.S. and S.D. testified to the following facts at defendant's trial
On one shift, S.D., then fourteen, became uncomfortably warm while she was working the restaurant drive-thru window. Defendant told her that she could turn a fan on and although she told him she did not need help to reach the switch, defendant grabbed S.D.'s waist and lifted her to assist her reach. Defendant then left the drive-thru area. When he returned, he touched S.D.'s buttocks with his hand but told her it was an accident. Defendant again left the drive-thru area. He returned and touched S.D.'s buttocks with his hand several times, leaving between each touching for five to ten minutes. Finally, defendant returned to the drive-thru and while both were fully clothed stood behind S.D. and rubbed his penis on her buttocks.
S.S. began working at the restaurant when she was fifteen years old. While 8.8. was working at the drive-thru window, defendant stood behind her and rubbed his penis against the center of her buttocks while both were fully clothed. Defendant repeated this act approximately twenty to thirty times while S.S. worked at the restaurant, always at the drive-thru window. - Additionally, when S.S. was sixteen years old, defendant told her to go to the walk-in freezer to get some french fries. Defendant followed S.S. into the freezer and grabbed her hand and held it against his penis for about forty-five [924]*924seconds. S.S. pulled her hand away and immediately left the freezer.
With respect to S.D., the People charged defendant with one count of sexual assault on a child (count 1) in violation of section 18-8-405(1), C.R.S.2010, and one count of sexual assault on a child-pattern (count 2) in violation of section 18-8-405(1) and (2)(d), C.R.S. 2010. Concerning S.S., the People charged defendant with one count of unlawful sexual contact with force (count 3) in violation of sections 18-8-402(4), 18-8-404(1)(a) and (2), C.R.S8.2010, and five counts of unlawful sexual contact (counts 4-8) in violation of section 18-8-404(1)(a).
The jury convicted defendant on all counts except count 3. Defendant appealed.
II. Double Jeopardy
We first reject defendant's argument that his convictions for counts 1 and 2 should be merged because he was charged with multiple offenses within the same unit of prosecution in violation of his rights against double jeopardy under both the United States and Colorado Constitutions.
We disagree with defendant that he preserved his double jeopardy argument by stating in his motion for judgment of acquittal regarding his acts toward S.D. that "in order to have a pattern, there has to be different and distinct acts." This statement was not sufficient to alert the trial court as to the issue of double jeopardy. Accordingly, we review for plain error. People v. Tillery, 281 P.3d 36, 47 (Colo.App.2009) (cert. granted May 24, 2010) (reviewing defendant's unpre-served claim of double jeopardy error and supplemental assertions for plain error under Crim. P. 52(b)). We recognize as plain error those obvious and substantial errors that "so undermined the fundamental fairness of the trial itself ... as to cast serious doubt on the reliability of the judgment." People v. Miller, 118 P.3d 748, 749-50 (Colo.2005) (quoting People v. Sepulveda, 65 P.3d 1002, 1006 (Colo.2008)).
The Double Jeopardy Clauses of the United States and Colorado Constitutions protect an accused from being tried or punished multiple times for the same offense. U.S. Const. amend. V; Colo. Const. art. II, § 18; Woellhaf v. People, 105 P.3d 209, 214-15 (Colo.2005) (citing Whalen v. United States, 445 U.S. 684, 688, 100 S.Ct. 1482, 63 L.Ed.2d 715 (1980).
Double jeopardy is commonly implicated when a statute establishes multiple ways of committing the same offense and a defendant is charged with multiple offenses because the offense was committed using more than one of the alternative methods. Woellhof, 105 P.3d at 215. In these situations, a defendant may be prosecuted for distinct offenses under the same criminal statute where (1) the unit of prosecution prescribed by the General Assembly permits the charging of multiple offenses, and (2) the evidence supporting each offense justifies the charging of distinct offenses. Id.
"Any sexual contact" constitutes the unit of prosecution for sexual assault on a child. Id. at 216. The prosecution may seek multiple convictions under the statute "if the evidence adduced in support of each count justifies the charging of distinct offenses." Quintamo v. People, 105 P.3d 585, 591 (Colo. 2005).
- Sexual assault incidents may be factually distinct if, among other things, separate criminal acts occurred at different times, were separated by intervening events, resulted from separate volitional events based on a "fresh impulse," were temporally distinct, involved moving or repositioning the victim, involved penetration of different orifices, or involved more than one victim. Id.
Here, the prosecution had sufficient evidence to charge defendant with two counts arising from two separate sexual assault crimes on S.D. S.D. testified that defendant had touched her buttocks with his hand, then left the drive-thru for approximately five or ten minutes (or at another point she testified to as much as fifteen minutes), and returned several times to touch her buttocks with his hand again. S.D. testified that defendant again left the drive-thru and only then came back and rubbed his penis against her buttocks. Thus, the evidence demonstrated that the touchings resulted from separate volition[925]*925al events. See id. at 592 (the relocation of the victim to various areas of the house, statements by the defendant indicating renewed intentions, the presence of a sufficient break in acts, and other circumstances offered the defendant an opportunity to reflect before embarking on a new course of conduct). Accordingly, the prosecution's separate charges were not improper based upon the evidence, and defendant was not placed in jeopardy of being charged and convicted twice for the same offense. We therefore discern no error, plain or otherwise.
III. Unanimity
Defendant complains of three unanimity problems. First, he contends that the trial court erred in not requiring the People to more specifically elect the act providing the basis for count 1 involving S.D. Second, he contends that the trial court erred in not requiring the People to elect a specific act for the pattern of abuse sentencing enhancer in count 2 or in not providing a modified unanimity instruction. Third, he complains that the trial court's solution of merging counts 4-8 into one count did not resolve the unanimity problem after the jurors convicted on each count but indicated by special interrogatory on the verdict forms that they were not unanimous as to the specific act which constituted the merged offense. We reject defendant's first two contentions but agree with the third.
An accused has the right to a jury trial and a unanimous jury verdict. U.S. Const. amends. VI, XIV; Colo. Const. art. II, §§ 16, 25, § 16-10-1108, C.R.S.2010 ("The verdict of the jury shall be unanimous."); Thomas v. People, 808 P.2d 144, 158-54 (Colo.1990). "The trial court is responsible for ensuring that the jury is properly instructed on the law and that a conviction on any count is the result of a unanimous verdict." People v. Rivera, 56 P.8d 1155, 1160-61 (Colo.App.2002).
When evidence of many acts is presented, any one of which could constitute the offense charged, the trial court must take one of two actions to ensure jury unanimity: (1) require the prosecution to elect the transaction on which it relies for the conviction, or (2) if there is not evidence to differentiate between the acts and there is a reasonable likelihood that jurors may disagree on the act the defendant committed, instruct the jury that to convict it must agree unanimously that the defendant committed the same act or that the defendant committed all of the acts included within the period charged. See Thomas, 808 P.2d at 158-54; Rivera, 56 P.8d at 1160.
There are however several exceptions to this rule. "[When the evidence does not present a reasonable likelihood that jurors may disagree on which acts the defendant committed, the prosecution need not designate a particular instance." Quintano, 105 P.8d at 593 (quoting Thomas, 803 P.2d at 158-54). Additionally, when a defendant is charged with crimes occurring in a single transaction, the prosecutor need not elect among the acts, and the trial court need not give a modified unanimity instruction. Meli-ma v. People, 161 P.8d 635, 689-40 (Colo. 2007).
A. Unanimity for Count 1 Involving S.D.
Defendant contends that the trial court abused its discretion because the People's election of the specific act defendant committed for count 1 was insufficient to allow the jury to reach a unanimous decision. We disagree.
A trial court has discretion to decide whether there is a reasonable likelihood that jurors may disagree on the act the defendant committed. People v. Gookins, 111 P.3d 525, 528 (Colo.App.2004). A court abuses its discretion if its decision is manifestly arbitrary, unreasonable, or unfair. People v. Dunlap, 124 P.3d 780, 798-99 (Colo. App.2004).
In Thomas, a defendant was convicted of two counts of sexual assault on a child. 808 P.2d at 146. The victims were ages three and five at the time of the molestation. Trial testimony indicated that the improper contact consisted of genital fondling and oral and anal sex. The trial court required the prosecution to select a specific sexual act for each charge but did not require the designation of a particular time or date. The prosecution [926]*926selected the touching of the defendant's hands to one victim's vaginal area and the touching of the defendant's penis to another victim's anal area as being the criminal acts underlying the charged offenses.
In rejecting the defendant's claim that the prosecution should have been required to select a specific incident, the Thomas court held that "when the evidence does not present a reasonable likelihood that jurors may disagree on which acts the defendant committed, the prosecution need not designate a particular instance." Id. at 158. The court also held that any error in not instructing the jury that it must be unanimous on the same act was harmless because the prosecution made an election of an act as to each victim, the defense was a general denial, and there was no rational basis for some jurors to predicate guilt on one act while other jurors based it on another. Id. at 154-55.
Here, the verdict form for count 1 stated:
SEXUAL ASSAULT ON A CHILD-VICTIM LESS THAN 15
(The first touch of [S.D.'s] butt in the drive thru).
At trial, defendant objected that this verdict form was insufficient to ensure that the jury unanimously found that he was guilty of the same instance of touching S.D.'s buttocks because S.D. had testified to as many as six instances of touching. The trial court found that the People's election and the verdict form were sufficient: "there [was] some vagueness as to exact details of first touch, but nonetheless, I think this will be sufficient to allow the jury to focus on that and determine exactly what it is that they are talking about in rendering a verdiet on this count."
During the People's direct examination of S.D., the following colloquy regarding defendant touching S.D.'s buttocks took place:
Q I want to ask you about this first time. How did it make you feel when he did that?
A I didn't think anything of it at first, because, you know, as I said, I thought he was like watching me and making sure I was doing okay. And so at first I didn't think anything. I didn't think anything of this. I thought it was an accident.
Q When he came back the second time, where was he standing in relation to you?
A In back of me again.
Q And did he touch you again?
A Yes, he did.
S.D. described how defendant repeated the same act (the touching of her buttocks with his hand) several times. S.D. was the only witness who testified as to defendant's conduct in the drivethru, and so there was less likelihood of juror confusion. As in Thomas, defendant's defense was general and designed to show that none of the incidents alleged by S.D. occurred. See Thomas, 808 P.2d at 155. Further, the evidence presented no basis for jurors to conclude that one of the alleged touchings of S.D.'s buttocks occurred but the others did not. See People v. Hansen, 920 P.2d 8831, 887 (Colo.App.1995) (trial court's failure to require an election of the acts or give a specific jury instruction did not violate unanimity principles where nothing in the evidence would have led jury to find the defendant committed one type of repeated sexual abuse but not another type).
Therefore, the trial court did not abuse its discretion in rejecting defendant's request to give a modified unanimity instruction or in requiring the prosecution to more specifically elect an act or acts to support count 1. See People v. Noble, 685 P.2d 203, 211 (Colo.1981) (no deprivation of right to unanimous verdict where jury was instructed on general requirement of unanimous verdict and ample evidence supported guilty verdict on either or both methods of committing offense).
B. Unanimity for Count 2-Pattern of Abuse Involving S.D.
Defendant contends his conviction on the count 2 pattern of abuse sentencing enhancer should be reversed. He asserts that neither the instruction defining a pattern of abuse nor the verdict form required the jury to make a unanimous decision on the act that constituted the predicate offense and the People failed to elect the predicate act with specificity. We disagree.
As noted, a trial court has discretion to decide whether there is a reasonable likelihood that jurors may disagree on the act the [927]*927defendant committed. (Gookins, 111 P.8d at 528-29.
To prove a pattern of abuse under section 18-8-405(2)(d), the prosecution must prove beyond a reasonable doubt that (1) the defendant committed an act charged under section 18-8-405(1) that constituted the predicate offense for section 18-3-405(2)(d); and (2) the other act or acts constituting the pattern of sexual abuse were committed prior to or at any time after the predicate offense. § 18-3-405(2)(d); see also People v. Kyle, 111 P.8d 491, 502 (Colo.App. 2004). A "[plattern of sexual abuse" is "the commission of two or more incidents of sexual contact involving a child when such offenses are committed by an actor upon the same victim." § 18-3-401(2.5). "Under [seetion] 18-83-405(2)(d), a pattern of sexual abuse is a sentence enhancement factor that, like the substantive predicate offense, must be proved beyond a reasonable doubt." Kyle, 111 P.3d at 501. Unanimity principles also apply when there is an enhancement for sexual assault on a child as part of a pattern of sexual abuse. See id. at 502.
Here, in count 2, the People charged defendant with sexual assault on a child for "[rjubbing his penis on [S.D.'s] butt in the drive thru." Defendant objected to the pattern of sexual abuse interrogatory as part of the count 2 verdict form because it did not require the jury to make a unanimous decision on which act it relied upon for the pattern of sexual abuse. The trial court overruled this objection, stating that it would not "require from the jury that they answer an additional interrogatory essentially determining the guilt of the defendant on either the prior Count 1, or perhaps some other uncharged offense." The jury found that defendant committed a pattern of sexual abuse and marked the pattern interrogatory that stated, "We the jury, unanimously find, beyond a reasonable doubt, that the defendant committed the act as part of a pattern of sexual abuse."
We reject defendant's argument that the People failed to specify a predicate act for the pattern count. In count 2, the People elected the "rubbing [of] his penis on [S.D.'s]l butt in the drive thru" as the second predicate act. The jury returned a unanimous verdict as to count 2 and defendant does not challenge the unanimity of this verdiet on appeal. In count 1, the People elected the first touch of S.D.'s buttocks, and the jury returned a unanimous verdiet as to this specific act as discussed above. Thus, the People adequately elected the specific acts underlying each count which constituted the pattern of sexual abuse. Therefore, any error the trial court may have committed in not also providing a modified unanimity instruction for the pattern interrogatory was harmless. See Thomas, 808 P.2d at 154; see also People v. Brown, 70 P.8d 489, 492 (Colo.App. 2002) (concluding that jury could not have convicted the defendant of pattern of sexual abuse without unanimously finding that he committed the two alleged acts).
We also reject defendant's argument that the prosecutor's statements in closing indicated to the jury that it was not required to find unanimously that defendant committed the same predicate acts for the pattern. In closing, the prosecutor highlighted the elected act for count 2 (rubbing defendant's penis on S.D.'s butt). The prosecutor also recited the definition of pattern of sexual abuse from the instructions, which tracked the statutory language. He then stated:
Two or more incidents of sexual contact involving a child. Ladies and gentlemen, she was able to describe there was a definite, distinct difference between the first contact when he touched her and he left, he came back again and touched her again, he left. He came back and touched her again and left. He came back and rubbed himself upon her. There was a break between each. That's two or more incidents.
Nothing about this statement was a misstatement of the unanimity requirement or the elected acts for count 1 and 2. Instead, the prosecutor was reiterating his election of the specific act for count 1 (first touching of S.D.'s butt) and count 2, albeit in a less precise fashion than stated on the verdict form.
C. Unanimity for Counts 4-8 Involving S.S.
Defendant next argues that the trial court erred in merging counts 4-8 because [928]*928merger did not resolve the unanimity problem created by the court's rejection of his proposed modified unanimity instruction. We agree.
Whether a defendant was denied due process of law by the prosecution's failure to elect the particular acts on which it relied for counts 4-8 is a question of law that we review de novo. See Quintano, 105 P.3d at 592.
Here, counts 3-8 concerned defendant's acts committed against S.S. The jury acquitted defendant on count 3, unlawful sexual contact-no consent-with force. The verdict form specified that count 3 concerned defendant's acts "[in the freezer." Counts 4-8 were each for unlawful sexual contact. The verdict forms for counts 4-8 did not specify an act but included a form of unanimity instruction which provided that if the jury found defendant guilty of the count it must mark one of two options:
* * [] We, the jury unanimously and beyond a reasonable doubt find that the Defendant committed a specific act and we are using that specific act to support our verdiet on this count and this act is different than any used to support verdicts on any other count of UNLAWFUL SEXUAL CONTACT-NO CONSENT.
* * [] We the jury do not so find.
The jury found defendant guilty of counts 4-8. Nevertheless, it marked the latter box stating, "We the jury do not so find," indicating that it was not unanimously finding that defendant committed a specific act to support its verdict on each of the verdict forms for counts 4-8.
Defendant made a post-trial motion for a new trial, arguing that the jury was not unanimous as to the specific acts he committed that supported counts 4-8. The trial court denied the motion for a new trial, stating:
The jury clearly found that the defendant was guilty, and the interrogatory was designed to essentially address any concern there might be about unanimity or election of the events that were testified to by the victims.
In the particular count, on Counts 4 through 8, I do find that basically the jury was not unanimous and did not find beyond a reasonable doubt that a specific act was being selected. I don't find the unanimity problem with this particular interrogatory, or the indication that the jury was not otherwise unanimous with their verdict. I find they were not able to specify the act that they were using to support the verdict could be a different count, or a different act than that used in the verdicts on the other unlawful sexual contact without consent. The Court finds the merger of the counts would be appropriate and I will sentence as if there was one guilty verdict on unlawful sexual contact without consent.
(Emphasis added.)
After specifically finding that "the jury was not unanimous and did not find beyond a reasonable doubt" that defendant committed a specific act to support each count, the trial court attempted to solve the unanimity problem by merging the five counts into one count. The merger may have resolved defendant's double jeopardy concerns. See Woellhaf, 105 P.3d at 219-20 (concluding that merging four convictions of sexual assault on a child into one conviction resolved defendant's complaint of double jeopardy violation). However, it did not resolve the unanimity problem.
The jury rejected a finding of unanimity as set forth in the modified unanimity instruction with respect to each of the five counts. Unlike the verdiet forms for counts 1-2, in which the People elected specific acts to support the underlying counts, the People did not elect specific acts for counts 4-8 and the verdict forms are otherwise silent in this respect.
Our review of the transcript reveals that evidence was presented that would have allowed jurors to rely on different acts in deciding to convict on the five separate counts. There were inconsistencies in S.S.'s testimony. She told an investigator before trial that defendant had grabbed her buttocks twenty or thirty times. In contrast, at trial she stated that she did not remember [929]*929telling the investigator that defendant had grabbed her buttocks. Rather, she testified that defendant had stood behind her and while both were fully clothed pressed his penis against the center of her buttocks.
Additionally, other than the freezer incident, which the People charged in a separate count, nothing in the evidence enabled the jury to distinguish between the different touchings. See Thomas, 808 P.2d at 155 ("nothing in the evidence distinguished the various acts that could have been the basis for conviction on any particular count") (citing State v. Altgilbers, 109 NM. 458, 786 P.2d 680, 696 (N.M.Ct.App.1989)). Therefore, we reverse defendant's conviction on counts 4-8 because "it is impossible to be reasonably certain of the reliability of the judgment of conviction." Gookins, 111 P.8d at 528 (quoting Woertman v. People, 804 P.2d 188, 192 (Colo.1991)).
Having reached this conclusion, we need not address defendant's remaining contentions with respect to counts 4-8.
IV. Expert Endorsement
Defendant next contends that his convictions should be reversed because he was deprived of his due process rights to a fair trial under both the United States and Colorado Constitutions when the trial court allowed a witness whom the prosecution had endorsed only as a lay witness to testify as an expert. We disagree.
While defendant now couches his argument in terms of a violation of his due process rights, below he only challenged the trial court's interpretation of the discovery requirements in Crim. P. 16. Other than Till-ery, we are aware of no case, nor does defendant cite any, applying plain error review to a general due process argument that was not preserved.
To the contrary, our supreme court continues to state that appellate courts should not reach constitutional arguments raised for the first time on appeal. Martinez v. People, 244 P.8d 185, 189 (Colo.2010) (citing People v. Cagle, T51l P.2d 614 (Colo. 1988)); see also City & County of Broomfield v. Farmers Reservoir & Irrigation Co., 289 P.3d 1270, 1276 (Colo.2010) (reiterating that an appellant must raise each "separate and independent" constitutional claim in the trial court before it can be raised for the first time on appeal and citing Rose v. City & County of Denwer, 990 P.2d 1120, 1121 (Colo.App. 1999), which held that because plaintiff raised claims under the Fourth and Fourteenth Amendments in the trial court, he could not raise an unpreserved claim under the First Amendment); People v. McMurtry, 122 P.3d 237, 241-42 (Colo.2005) (citing Cagle and noting that a defendant may only raise his constitutional right to speedy trial on appeal if he first raised it in the trial court).
In declining to reach defendant's un-preserved due process claim, we acknowledge some precedential inconsistency as noted in the concurring opinion. However, we view defendant's unpreserved double jeopardy claim, which we reached in Part II in the exercise of our discretion under Hinojos-Mendoza v. People, 169 P.3d 662, 667-68 (Colo.2007), as distinguishable from his due process claim for several reasons.
First, the double jeopardy claim could be reviewed as a matter of law apart from a fully developed factual record. Second, the consequences of error are merely remanding to vacate one sentence, not reversing and ordering a retrial. See People v. Sepulveda, 65 P.3d 1002, 1008 (Colo.2008) (noting "social costs of reversal and retrial," including "witnesses' memories fade, witnesses move away and victims hesitate to testify again"). Third, even if the double jeopardy objection had been raised before trial as to the charging document, the other charge or charges would still proceed to trial, and so the purpose of conserving judicial resources by affording the trial court an opportunity to correct error and thereby avoid a retrial does not apply. See People v. Pahl, 169 P.3d 169, 188 (Colo.App.2006) (purpose of contemporaneous objection rule to conserve judicial resources). Fourth, because the double jeopardy claim ripens only upon conviction of multiple offenses, an appeal of the conviction for the greater offense would be likely even if defendant had raised double jeopardy after verdict and the trial court had corrected the alleged error at sentencing.
[930]*930In contrast to his newly raised due process claim, defendant devoted his entire argument regarding the expert below to a misapplication of Crim. P. 16, which he also raises here in conjunction with his due process claim. Evaluating that claim would require considering prejudice from lack of notice, on which the record may not be complete and the trial court was not afforded an opportunity to rule. See United States v. Williams, 576 F.3d 385, 388-91 (7th Cir.2009) (reviewing for abuse of discretion defendant's claim that denial of a continuance based on government's "surprise" witness was prejudicial). Were we to conclude on due process grounds that the trial court should have precluded all testimony from the expert, reversal and retrial would be required. Cf People v. Veren, 140 P.3d 131, 189-40 (Colo.App.2005). And for this reason, entertaining the unpre-served due process issue on appeal risks defendants "gambling for favorable verdicts and then resorting to appeal on errors that might easily have been corrected by objection at trial." People v. Petschow, 119 P.8d 495, 505 (Colo.App.2004).
Therefore, we elect to reach only defendant's concerns with the disclosure requirements of Crim. P. 16.
Traditional principles of statutory construction inform the analysis of court rules. Leaffer v. Zariengo, 44 P.3d 1072, 1078 (Colo.2002). Hence, we are not free to depart from the plain language of a supreme court rule. People v. Jackson, 972 P.2d 698, 700 (Colo.App.1998).
Crim. P. 16(I)(a){1){(VII) requires the prosecutor to provide the defendant with "[a] written list of the names and addresses of the witnesses then known to the district attorney whom he or she intends to call at trial." Crim. P. 16 does not specifically state how a witness must be endorsed-as a lay witness or an expert witness. However, if a witness that the prosecution intends to call at trial is an expert, the prosecution must provide pertinent reports and statements at least thirty days before trial. Crim. P. 16(I)(a)(1)(III), (b)(8).
The prosecutor endorsed Ann Smith as a witness in the complaint and information. However, she was not specifically identified as an expert witness. During the trial, the prosecutor stated his intention to call Smith as an expert. Defense counsel objected because Smith had not been endorsed as an expert. The prosecutor admitted that Smith had not been endorsed as an expert but said that Crim. P. 16 does not set forth a specific requirement that an expert be identified as an expert.
The trial court overruled defense counsel's objection, agreeing with the prosecution that Crim. P. 16 does not specifically require a witness to be identified as an expert, but said that defendant could raise other foundational challenges to Smith's expert testimony. The trial court later qualified Smith as an expert in forensic interviewing and child maltreatment.
While it might have been a better practice for the prosecution to specifically identify Smith as an expert witness, we do not read Crim. P. 16 to require such an endorsement. Unlike the civil rules, which compel voluntary disclosure of experts, the Colorado Rules of Criminal Procedure do not. Like the federal rules, see Fed.R.Crim.P. 16(a)(1)(G), the Colorado Rules of Criminal Procedure require the defendant to request and justify specific discovery regarding experts in cases where no report or statement by the expert has been provided to the prosecutor. See Crim. P. 16(D(d)(B). Thus, we recognize an anomaly between our civil and criminal procedural rules concerning the disclosure of experts.
Contrary to defendant's assertion, Crim. P. 16(I)(d)(8) does not require that the prosecution have disclosed experts as endorsed witnesses prior to trial. Instead, the rule places the burden on the defendant to request such information unless the court sua sponte issues such an order. The rule only provides that a court may, upon motion, require disclosure to the defense of relevant material which the prosecutor is not otherwise compelled to disclose. "Where the interests of justice would be served, the court may order the prosecution to disclose the underlying facts or data supporting the opinion ... of an expert endorsed as witness." [931]*931Crim. P. 16(D(d)(@). Here, defendant made no such request, although the record indicates his counsel's awareness that Smith had given expert testimony in other cases. And there were no statements or reports made by the witness prior to trial. Additionally, defendant's claim that he was unfairly surprised and unable to prepare adequately for cross-examination is discredited by his failure to move for a continuance. See People v. Wieghard, 727 P.2d 383, 886 (Colo.App.1986) (concluding that the defendant's failure to move for a continuance discredited any claim of prejudice).
We also reject defendant's argument that under Crim. P. 57(b) the trial court should have looked to C.R.C.P. 26(a)(2)(A) to resolve any ambiguity in the endorsement requirements. Crim. P. 57(b) provides that the trial court may look to the Rules of Civil Procedure "[if no procedure is specifically prescribed by [a criminal] rule." Crim. P. 16 specifically dictates the procedures for discovery in criminal cases and defendant cites no authority for the proposition that C.R.C.P. 26 should apply to criminal discovery issues. And even assuming some ambiguity in Crim. P. 16(D(a){(1)(VII) regarding the specific type of a witness endorsement, Crim. P. 57(b) states that the trial court "may proceed" to apply the Rules of Civil Procedure. The trial court was therefore not required by Crim. P. 57(b) to utilize C.R.C.P. 26(a)(2)(A), and we discern no violations of Crim. P. 16.
V. Conclusion
The judgment is reversed as to the convictions related to S.S. (counts 4-8), and the case is remanded for further proceedings consistent herewith. The judgment is otherwise affirmed.
Judge WEBB concurs.
Judge J. JONES specially concurs.