delivered the opinion of the Court.
In this аppeal, we address whether the trial court properly refused to allow defendant to give alibi testimony based on his failure to provide timely notice of his alibi to the State under 3:12-2. We also consider whether the prosecutor’s summation was fair when he expressed his opinion that because the victim was deaf and mute, she had a heightened sensory perception and therefore her identification of defendant was reliable.
The Appellate Division held that the trial court violated defendant’s constitutional rights when it declined to allow him to offer alibi testimony and that it was plain error for the prosecutor to essentially vouch for the reliability of the victim’s identification. We affirm the judgment of the Appellate Division but for different *496 reasons. We conclude that the trial court abused its discretion when it denied defendant from fully presenting his alibi testimony; consequently, we need not reach the constitutional issue. We also hold that the prosecutor should not have commented on facts outside of the record.
I.
The State presented evidence to show that on the night of April 26, 2000, S.D., a forty-year-old deaf and mute woman was walking home from a friend’s house late at night. She was high on heroin at that time. A bicyclist, later identified as defendant, approached S.D. from behind, threw down his bicycle, and pulled her to the ground. Despite S.D.’s screams and attempts to fight defendant off, defendant reached inside S.D.’s pockets, pulled down her pants, and sexually assaulted her. Following the attack, defendant apologized and rode away on his bicycle.
S.D. ran to two nearby houses gesturing for help, but no one assisted her. Finally, she noticed a police ear and motioned for it to stop. Officer Ronald Fusco assisted S.D., who was “hysterical” and “covered in dirt,” with cuts and bruises to her face. After Fuscо realized that S.D. was mute, he gave her some paper on which she could communicate with him. At some point, it became apparent to Fusco that S.D. was also deaf and was reading his lips to understand his questions. S.D. related the incident and described her attacker as a black male, five feet six inches, with a stocky build, wearing a yellow and green “mix” jacket and a black hat. Fusco broadcasted the description of the attacker over his police radio and then drove S.D. to the hospital. The hospital staff examined S.D. and prepared a sexual assault examination.
Early thе next morning, the police formed a task force to conduct surveillance in the area where the attack occurred. That afternoon, S.D. went to the police station, and, aided by an interpreter, she described her attacker to a sketch artist. Later, S.D. admitted she was high on heroin at the time that she gave that description.
*497 That night, the police arrested a man in the area of the attack, but quickly determined that he did not meet the description of the attacker. The police then continued surveillance. On April 30, 2000, at 3:45 a.m., the police spotted a man riding a bicyclе in the area near where the assault took place who fit the description of the attacker. Detective Daniel Passerelli responded to the area and observed defendant circle the block. Passerelli then pulled his marked police car alongside of defendant and asked if defendant would stop to speak with him. Defendant agreed. In response to Passerelli’s questions, defendant explained that he was heading home from a friend’s house and had not made any detours. When Passerelli replied that he had seen him ride around the block, defendant apologized for lying. After Passerelli determined that there were no outstanding warrants on defendant, he allowed defendant to leave.
The next morning, May 1, 2000, Detective Caminiti included defendant’s photograph in a photo array. S.D. viewed the array and identified defendant as her attacker. Passerelli then obtained an arrest warrant for defendant and a search warrant for his residence, as well as an order to compel defendant to provide blood and saliva samples for DNA testing. The police arrested defendant at his home and seized items of clothing and his bicycle. After waiving his Miranda 1 rights, defendant admittеd he had consensual sex with S.D. on a high school field “about a week ago.” Defendant refused, however, to provide a written statement.
At some point, one of the vaginal swabs taken from S.D. during her sexual assault examination tested positive for semen. The police then sent two other vaginal swabs, a stain from S.D.’s underwear, and blood swatches from defendant and S.D. to Cell-mark Diagnostics for DNA analysis. Robin Cotton, the Forensic Laboratory Director of Cellmark Diagnostics, testified as an expert on the findings of the DNA analysis. She reviewed the DNA test results and agreed that defendant’s DNA matched the DNA *498 recovеred from the vaginal swabs and S.D.’s underwear. She acknowledged that there were gene numbers found in the sample that could not be attributed to either S.D. or defendant, but denied that those gene numbers were anything other than result of contamination of the samples.
Shortly before the State presented its final witness, defense counsel informed the trial court that defendant planned to testify. The court asked counsel to outline the substance of that testimony. Defense counsel replied that defendant would testify that he “is not the person.” With counsel’s permission, the court asked defendant whether he was gоing to testify that he had an alibi or that he was someplace else when the alleged rape took place. Defendant answered that he planned to testify that he was someplace else at the time, and added that he would not testify that he had consensual sex with the victim.
At this point, defense counsel objected to the court’s line of questioning. After the prosecutor raised the lack of notice of alibi pursuant to Rule 3:12-2, counsel engaged in a lengthy colloquy with the court regarding the admissibility of defendant’s testimony. Defense counsel urged that defendant was not presenting an alibi and thаt alibi notice was only required if the defense planned to present witnesses to confirm defendant’s story. As an alternative, defense counsel suggested that the court should allow the testimony to determine whether the State was prejudiced and some accommodation should accordingly be given to the State, or if necessary, whether a mistrial was appropriate.
The State argued that defendant’s proffered testimony constituted an alibi and, if admitted, the State would ask to strike it or alternatively would need time to investigate the details of defendant’s claims. Following a recess, howеver, the prosecutor reconsidered and asked the court to wait until defendant testified to determine whether or not to grant the State more time to try to investigate his alibi.
The court concluded that the State would be prejudiced if defendant was permitted to present his proffered testimony. Con *499 sequently, it ruled that defendant was precluded from presenting his alibi.
After the State presented its final witness, defense counsel indicated that defendant still wanted to testify. During a colloquy prior to defendant’s testimony, the court warned defendant not to testify to his alibi. Additionally, the court approved the prosecutor’s use of defendant’s multiple criminal convictions dating back to 1991 through 1996 to impeach him. Thereafter, defendant testified that he never saw the victim before trial, that he never had sexual intercourse with her, and that he never made a statement to the police that he had consensual intercourse with her.
After defendant completed his case, the State called Passerelli in rebuttal. Passerelli reiterated that defendant admitted to having consensual sex with S.D. He related that on May 2, 2001, sometime around 10:00 a.m., he was informed that defendant wished to speak with him regarding his case. Pаsserelli read defendant his Miranda rights. After defendant signed a waiver, he agreed to answer questions. Passerelli testified that at that point, defendant claimed that he had consensual sex with S.D. at her behest.
The jury found defendant guilty of first-degree aggravated assault, second-degree sexual assault, and second-degree robbery. The trial court sentenced defendant to an aggregate sixty years with a twenty-five year parole disqualifier.
The Appellate Division reversed in a published opinion.
State v. Bradshaw,
392
N.J.Super.
425,
We granted the State’s petition for certification. 192
N.J.
481,
II.
The State argues that the Appellate Division erred in declaring the notice-of-alibi rule unconstitutional as applied to a defendant’s own testimony. The State explains that our judicial system provides for broad reciprocal discovery and that our case law authorizes the State to receive in advance the evidence that a defendant intends to use at trial to avoid surprise claims that cannot be invеstigated prior to trial. The State urges that the appropriate test for preclusion of a defendant’s undisclosed alibi testimony is the four-part balancing test applied in
State v. Gonzalez,
223
N.J.Super.
377,
In contrast, defendant argues that the notice-of-alibi rule does not apply to his own testimony. Even assuming the rule’s applicability, defendant contends that the interest of justice requires that his alibi testimony should be allowed because an application of the factors enumerated in Francis and Gonzalez tip the balance in favor of applying a sanction less severe than preclusion. Specifically, defendant submits that the State could not have been surprised by defendant’s testimony because it logically had to have known that defendant would deny his presence at the scene if he took the stand to testify. In addition, he claims that the State would not have had to investigate defendant’s claims because he planned to testify that he was alone in his home, but that even if additional investigatiоn was necessary, a continuance would have been sufficient. Lastly, defendant argues that it was error for the prosecutor to impermissibly vouch for the reliability of the victim’s testimony, and, without any evidentiary basis, suggest that people with handicaps have heightened sensory perception.
III.
A.
We turn first to Rule 3:12-2, the notice-of-alibi rule. That rule provides as follows:
(a) Alibi. If a defendant intends to rely in any way on an alibi, within 10 days after a written demand by the prosecutor the defendant shall furnish a signed alibi, stating the specific place or places at which the defendant claims to have been at the time of the alleged offense and the names and addresses of the witnesses upon whom the defendant intends to rely to establish such alibi. Within 10 days after receipt of such alibi, the prosecutor shall, on written demand, furnish the defendant or defendant’s attorney with the names and addresses of the witnesses upon whom the State intends to rely to establish defendant’s presence at the scene of the alleged offense. The trial court may order such amendment or amplification as the interest of justice requires.
(b) Failure to Furnish. If the information required in paragraph (a) is not furnished, the court may refuse to allow the party in default to present witnesses at triаl as to defendant’s absence from or presence at the scene of the alleged offense, *502 or make such other order or grant such adjournment, or delay during trial, as the interest of justice requires.
[it 3:12-2 (emphasis added).]
In
State v. Angeleri,
this Court faced a constitutional challenge to a former alibi rule that required a defendant to furnish the names and addresses of the witnesses on which he or she intended to rely to establish his or her alibi. 51
N.J.
382,
[Id. at 385,241 A.2d 3 .]
In answering the contention that the alibi might tend to incriminate the defendant, the Court explained that “[t]he Constitution does not protect a defendant from the consequences of the defense he [or she] makes, nor assure him [or her] a right so to defend as to deny the State a chance to check the truth of his [or her] position.” Ibid.
The Court addressed a related discovery issue in
State v. Williams,
80
N.J.
472,
This Court granted certification and affirmed.
Ibid.
The Court explained that the reciprocal discovery provision in our court rules was sound because the State was “entitled to know in advance what evidence a defendant intends to use at trial so that it may have a fair opportunity to investigate the veracity of such proof.”
Id.
at 478,
Our Appellate Division has also addressed the alibi rule in several published opinions. In
Francis, supra,
the defendant failed to give notice of an alibi defense, prompting the State to move to prohibit either the defendant or other witnesses from
*504
presenting alibi testimony. 128
N.J.Super.
at 349,
In
Gonzalez, supra,
the Apрellate Division elaborated on the test for preclusion set forth in
Francis.
223
N.J.Super.
at 383-91,
The United States Supreme Court has also considered issues concerning nоtice-of-alibi rules. In
Taylor v. Illinois,
the defense attorney during trial sought to amend his discovery answers to include the names of two alibi witnesses. 484
U.S.
400, 403, 108
S.Ct.
646, 650,
The Supreme Court considered whether the Sixth Amendment bars a court from using the sanction of preclusion to bar a defendant’s witness from testifying.
Id.
at 406, 108
S.Ct.
at 651,
In
Michigan v. Lucas,
a rape case, the Supreme Court addressed whether the trial court violated the defendant’s Sixth Amendment rights in prohibiting the defendant from presenting evidence of prior sexual relations with the rape victim. 500
U.S.
145, 149, 111
S.Ct.
1743, 1746,
We did not hold in Taylor that preclusion is permissible every time a discovery rule is violated. Rather, we acknowledged that alternative sanctions would be “adequate and appropriate in most cases.” We stated explicitly, however, that there could be circumstances in which preclusion was justified because a less severe penalty “would perpetuate rather than limit the prejudice to the State and the harm to the adversary process.”
[Id. at 152, 111 S.Ct. at 1748, 114 L.Ed.2d at 214 (citations omitted).]
The Court remanded the matter to the Michigan Court of Appeals to “address whether the trial court abused its discretion on the facts before it.”
Id.
at 153, 111
S.Ct.
at 1748,
Several federal circuit courts have held that absent a finding of a willful and blatant discovery violation, the sanction of excluding a witness is not appropriate.
See Noble v. Kelly,
The cases we have discussed thus far considered precluding the testimony of alibi witnesses for failure to give proper notice rather than the issue before us that involves defendant’s own alibi testimony. Prior to the
Taylor
decision, the Seventh Circuit addressed the attempt to preclude a defendant’s alibi testimony in
Alicea v. Gagnon,
B.
With the above landscape, we consider whether it was necessary for the Appellate Division to apply constitutional principles to invalidate our notice-of-alibi rule. In reversing the trial court’s decision to preclude defendant’s testimony, the Appellate Division rejected the principle of
Francis
and
Gonzalez
in favor of a constitutional underpinning. We have often stated that we will not reach a constitutional issue when it is not necessary to decide the appeal.
Randolph Town Ctr., L.P. v. County of Morris,
186 78, 80,
We adopt, as modified, the balancing test for preclusion of a defendant’s undisclosed alibi testimony set forth in Francis and Gonzalez, but include as an additional consideration whether the failure to give notice-of-alibi evidence constituted willful misconduct and intended to gain a tactical advantage. That is, in reaching a fair determination for the appropriate sanction for the breach of the alibi rule, the trial court should consider: (1) the prejudice to the State; (2) the prejudice to the defendant; (3) whether other less severe sanctions are available to preserve the policy of the rule, such as a continuance or a mistrial to permit the *508 State to investigate the alibi; and (4) whether the defendant’s failure to give notice was willful and intended to gain a tactical advantage. Absent a finding that the factors on balance favor preclusion, the interest of justice standard requires a less severe sanction. Moreover, in cases where there is evidence of an attorney’s willful violation of the notice rule to gain an advantage, courts should consider a referral to the Office of Attorney Ethics.
We turn now to apply those factors here. At trial, after a brief recess, the prosecutor asked the trial court to take a wait-and-see approach and decide what to do after defendant testified. Thus, the prosecutor recognized that the State might, or might not, need a continuance to investigate defendant’s evidence and wanted to keep its options open. In our view, based on defendant’s proffered testimony, the prosecutor’s suggestion to the court was fair and would have minimized any prejudice to the State. The State could have rеadily investigated defendant’s assertion that he was at home at the time of the alleged rape. Moreover, if the State’s evidence against defendant were believed, it was indeed very strong.
The second factor, the prejudice to defendant, is obvious. As noted, he would have testified he was in his home at the time of the incident. Thus, defendant, absent his own testimony, was unable to offer evidence that he was someplace else at the time of the offense. As the United State Supreme Court noted long ago, “the truth is more likely to be arrived at by hearing the testimony of all persons of comрetent understanding who may seem to have knowledge of the facts involved in a case, leaving the credit and weight of such testimony to be determined by the jury.” Rosen v. United States, 245 U.S. 467, 471, 38 S.Ct. 148, 150, 62 L.Ed. 406, 409 (1918).
The third factor, whether there are other less severe sanctions to preserve the policy of the rule, is also obvious. As noted, the prosecutor suggested the possibility of a continuance after hearing defendant’s testimony. Surely that sanction was available.
See Baldwin, supra,
47
N.J.
at 390,
Finally, there was no evidence to suggest that the fourth fаctor, whether the failure to give notice was willful and intended to gain an advantage, was satisfied. The record demonstrates that defense counsel mistakenly believed that the rule did not apply to defendant’s own testimony and there was no indication that it was a strategic choice by counsel to gain an advantage.
In sum, we are satisfied that this is not that rare circumstance when a defendant’s violation of the alibi rule should have resulted in the sanction of preclusion. We hold that it was an abuse of discretion for the trial court to deny defendant the opportunity to present his alibi testimony.
c.
If there is a “reasonable doubt as to whether the error denied a fair trial and a fair decision on the merits,”
State v. Macon,
57
N.J.
325, 338,
The State’s evidence included the victim’s identification of defendant as the assailant, DNA evidence that implicated defendant, and the statement defendant allegedly gave to the police. On the other side, defendant denied making any statement to the poliсe and denied involvement in the incident. Thus, it was for the jury to determine the credibility of the witnesses. Moreover, the testimony of the State’s DNA expert raised an issue of contamination of the DNA testing process for the cells that were analyzed, providing a basis for the jury to find that the DNA evidence was not conclusive. Absent the full scope of defendant’s testimony, the jury was denied the opportunity to fairly evaluate the evidence *510 and determine the credibility of the witnesses. Consequently, we remand for a new trial.
IV.
Because we remand the matter for a new trial, we need not fully address the State’s contention that the prosecutor’s summation was fair and appropriate. We offer only the following comments.
We start "with the notion that a prosecutor is afforded considerable leeway to make forceful arguments in summation.
Bender v. Adelson,
187
N.J.
411, 431,
Here, the prosecutor stated that “people with handicaps ... have stronger sensory perception,” and that the victim was “a lifelong 40-year-old trained observer,” and that “[h]er whole world is about her ability to recognize things,” to suggest that the victim had a stronger sensory perception than a person without a handicap. However, the State did not present evidence that the victim had a stronger sensory perception because of her condition. Consequently, those comments implied that the victim would not make a mistake in her identification of defendant due to her heightened sensory ability and went beyond the reasonable inferences from the evidence in the ease. In short, at any retrial, the prosecutor should neither argue facts that are not in the record, nor expressly or implicitly vouch for the credibility of the victim.
*511 V.
The judgment of the Appellate Division is affirmed and the matter is remanded for a new trial.
Notes
Miranda v. Arizona, 384 U.S. 436, 86 S.Ct. 1602, 16 L.Ed.2d 694 (1966).
