The opinion of the Court was delivered by
Alex Sanchez (Alex) and his brother, Juan Sanchez (Juan), were jointly indicted for second-degree robbery and related offenses. On the eve of their joint trial, Alex moved for severance, claiming that Juan would provide testimony exculpating Alex if the two were tried separately. The trial court denied the motion, and both Alex and Juan were convicted of all charged offenses. The Appellate Division reversed, holding that severance was warranted because there was a substantial likelihood that Juan would have offered exculpatory testimony for Alex if they had been separately tried. We granted certification, 140
N.J.
276,
I
On January 23, 1988, Mary Ann Wyman went shopping at the Monmouth Mall in Eatontown, New Jersey, along with her husband, daughter, and two grandchildren. At approximately 4:45 p.m., after Mrs. Wyman exited the mall and walked into the parking lot, a man grabbed her pocketbook and attempted to pry it away from her. Although Mrs. Wyman initially held on to the pocketbook, the assailant successfully wrestled it away on his second attempt. The force of the assailant’s efforts caused Mrs. Wyman to fall to the ground and fracture her pelvis. She remained hospitalized for five days and was unable to return to work for nineteen weeks.
*278 Mrs. Wyman’s husband, Kenneth, had been walking approximately ten feet in front of his wife at the time of the attack. Hearing a scream, he turned around and saw his wife lying on the ground. He then watched the assailant run to and enter a station wagon parked alongside the curb near a mall entrance. Mr. Wyman recognized the assailant as the same man he had earlier noticed standing next to the open passenger door of the station wagon. Mr. Wyman did not see the driver of the station wagon as the car sped away, but he took note of the car’s license plate number, CDE-82B. Mr. Wyman subsequently identified Juan at a photographic lineup as the person who had stolen his wife’s pocketbook.
The Wymans’ daughter, Laura Anselmo, was walking next to her mother at the time of the attack. At a photographic lineup and in court, she identified Juan as her mother’s assailant.
Deborah Polito, who worked as a hairdresser at the mall, also observed the robbery. She was warming up her car in the parking lot, preparing to return home from work, when she saw a man take Mrs. Wyman’s pocketbook, knock her to the ground, and enter his get-away car. Although Polito was not able to see the face of the assailant because of the speed of the attack, she had previously observed for approximately ten minutes the driver of the get-away car illegally parked in the fire zone abutting the mall. At a photographic lineup and in court, Polito identified Alex as the driver of the vehicle.
The screech of the get-away car caught the attention of Joseph Holsey, a shopper who was leaving the mall at the time of the robbery. He watched Mrs. Wyman fall to the ground, and then realized that the get-away car was approaching him. Fearing that the car would hit him, Holsey jumped back from the road to the sidewalk. From approximately four feet away, he saw two men through the windshield of the car. At a photographic lineup and in court, Holsey identified Alex as the driver of the vehicle and Juan as his passenger.
*279 The brothers were jointly indicted in March 1988 for second-degree robbery, contrary to N.J.S.A 2C:15-1; second-degree aggravated assault, contrary to N.J.SA 2C:12-lb(l); and third-degree theft, contrary to N.J.S.A 2C:20-3.
On Monday, December 7, 1992, the day the joint trial was scheduled to begin, Alex moved for severance. The basis for the motion was an affidavit signed by Juan on July 6, 1988, in which Juan admitted that he robbed Mrs. Wyman with Noel Manuel, the person to whom the station wagon bearing license plate number CDE-82B was registered. Juan stated in the affidavit:
How my brother Alex became implicated in this crime I[’ll] never understand, because he had no knowledge of Noel[’s] and [my] intensions before or after the [ ] incident. * * * [A] man (my brother) is being held for a crime [that] Noel and I committed. I[ ] will cooperate in any way ne[ce]ssary to gain Alex[’s] fre[e]dom. * * * Noel and I are the only people responsible for the robbery of that old lady in the mall.
At the time he signed the affidavit, Juan was incarcerated in Pennsylvania, having recently commenced a forty-year prison term with a twenty-year parole disqualifier for aggravated assault, indecent sexual intercourse with a minor, kidnapping, and corrupting the morals of a minor.
Alex’s lawyer, James N. Butler, Esq., explained to the cotut that until the preceding Friday he had assumed that at trial Juan would exonerate Alex in accordance with his affidavit. On that Friday, however, Juan’s lawyer informed Butler that Juan would not testify at a joint trial. Pursuant to the procedure outlined in
State v. White,
195
N.J.Super.
457, 460,
Upon further questioning, Juan explained that if he were to testify he would testify in accordance -with his affidavit. In attempting to understand Juan’s version of the events in question, the court asked whether Alex was present at the scene of the crime. The following colloquy resulted:
MR. JUAN SANCHEZ: I don’t think I’m in a position to answer that to you, Your Honor.
THE COURT: Why not? You were there.
MR. JUAN SANCHEZ: Well, because I don’t think that it would be right for me to say that Alex was there or not. I said that Alex wasn’t there. It was me and Noel. That’s what I said on the affidavit at that time.
THE COURT: You didn’t say Alex wasn’t there. You said you and Noel were there.
MR. JUAN SANCHEZ: Yeah.
THE COURT: But [what] I’m asking now is was he there. Was Alex there?
MR. JUAN SANCHEZ: I have to answer that?
THE COURT: Yes.
MR. JUAN SANCHEZ: Yes.
After the prosecutor, Alex, and Butler returned to the courtroom, Butler explained that his argument at trial would be that Alex “wasn’t there. So he really doesn’t know what happened at [the Monmouth Mall] on that particular date.” In a subsequent in camera hearing, Alex informed the court that he was working at Freedman’s Bakery in Belmar around the time of the crime and was not present at the crime scene.
*281 The trial court denied the severance motion. The court cited Juan’s failure to demonstrate that he would testify at Alex’s trial if the severance motion were granted. The court also noted that “the testimony of the two defendants is not consistent on the crucial issue of the presence of Alex at the scene. And, therefore, the defendants appear to the Court to be attempting to simply use the severance as a device to get one of them acquitted.” As an alternative basis for its ruling; the court found that the severance motion was not made in a timely manner under Rule 3:15 — 2(c), which, at the time of trial, required that “[a] motion for separate trial of counts of an indictment or accusation must be made within 30 days after the initial plea to the indictment or accusation.”
At trial, Juan neither testified nor called any witnesses. Alex did not testify, but a representative of Freedman’s Bakery testified for Alex that on January 23, 1988, Alex reported to work at 7:04 a.m. and punched out at 3:32 p.m. The jury convicted Alex and Juan of all three charged offenses.
In an unreported, per curiam opinion, the Appellate Division reversed Alex’s conviction. The court stated that Juan could not have been expected to testify at a joint trial, but there was a substantial likelihood that he would have testified at a separate trial for Alex. The court held that because the trial court in effect foreclosed the possibility that Alex could benefit from Juan’s testimony, the trial court abused its discretion in denying Alex’s severance motion.
II
Rule
3:7-7 allows for joinder of defendants who are “alleged to have participated in the same act or transaction or in the same series of acts or transactions constituting an offense or offenses.” This Court has stated that in such cases, where “much of the same evidence is needed to prosecute each defendant, a joint trial is preferable.”
State v. Brown,
118
N.J.
595, 605,
However, the interest in judicial economy cannot override a defendant’s right to a fair trial.
See State v. Coleman,
46
N.J.
16, 24,
If for any other reason it appears that a defendant or the State is prejudiced by a permissible or mandatory joinder of offenses or of defendants in an indictment or accusation the court may order an election or separate trials of counts, grant a severance of defendants, or direct other appropriate relief.
We have applied that Rule and its predecessor in a variety of factual settings in which defendants have claimed that a joint trial unduly prejudiced their right to a fair trial.
See, e.g., State v. Melendez,
129
N.J.
48, 57-60,
We have not heretofore addressed comprehensively the claim asserted here that a joint trial prevented a defendant from obtaining the exculpatory testimony of his codefendant.
But see Manney, supra,
26
N.J.
at 369,
The Appellate Division confronted such a situation in
State v. Morales,
138
N.J.Super.
225,
Because joint trials account for almost one-third of all federal criminal trials,
Richardson, supra,
481
U.S.
at 209, 107
S.Ct.
at 1708,
*285
Federal Rule of Criminal Procedure 14, which provides for relief from joinder, reflects the same concern about the potential prejudice to the jointly tried defendant as does our
Rule
3:15 — 3(b). In applying the federal rule to cases in which a defendant moves for severance based on the need for a codefendant’s testimony, a plurality of the federal circuits have required the moving defendant to demonstrate: (1) a
bona-fide
need for the testimony; (2) the substance of the desired testimony; (3) the exculpatory nature and effect of the desired testimony; and (4) that the codefendant would indeed testify at a separate trial.
See, e.g., United States v. Smith, 46
F.3d 1223, 1231 (1st Cir.),
cert. denied,
—
U.S.
-, 116
S.Ct.
176, 133
L.Ed.2d
116 (1995);
United States v. Ramirez,
The remaining circuits employ standards that are “similar * * * with only unimportant differences in wording.” Wright,
supra,
§ 225 n. 5;
see, e.g., United States v. Williams,
Although the standards applied by some federal courts for granting severance motions appear somewhat detañed, the courts have focused primarily on two factors: (1) the exculpatory nature
*287
of the proffered testimony; and (2) the showing that the testimony would be forthcoming in a separate trial.
See, e.g., United States v. Wilwright,
*288
In addressing whether the proffered testimony is sufficiently exculpatory, the federal courts have repeatedly stated that testimony does not qualify as “exculpatory” if the testimony is insignificant, cumulative, or merely a vague or conclusory assertion of innocence.
See, e.g., Reavis, supra,
Concerning the likelihood that a codefendant will testify, the federal courts generally have held that the moving defendant cannot establish that the codefendant’s testimony would be forthcoming in a separate trial if the codefendant’s willingness to testify is conditioned on his being tried first.
See, e.g., Reavis, supra,
Were we to accede to the co-defendant’s demand [regarding the order of the trials], we would “create a situation where, following his own trial, the witness would be more inclined to “throw a bone’ to his codefendants by testifying favorably to them because his own case had been disposed of and he had little to lose by testifying.” *289 [Reams, supra, 48 F.3d at 767 (quoting United States v. Becker, 585 F.2d 703, 706 (4th Cir.1978), cert. denied, 439 U.S. 1080, 99 S.Ct. 862,59 L.Ed.2d 50 (1979)).]
That approach routinely results in the denial of severance motions, for it is the rare defendant who makes an unconditional offer to exculpate his codefendant. Because a criminal defendant’s prior statements are admissible against him, a defendant with the ability to exculpate his codefendant generally will exercise his Fifth Amendment privilege rather than inculpate himself, unless his own trial already has been resolved. See Dawson, supra, at 1441.
State courts that have confronted severance requests based on the need for a codefendant’s testimony typically have followed the approach taken by the federal courts.
See, e.g., Lumpkin v. United States,
Two states, however, have taken a very different approach, granting jointly indicted defendants the right to severance in all felony cases. See Miss.Code Ann. § 99-15-47; Vt.R.Crim.P. 14. Texas has also departed from the federal approach by providing that in all cases where severance is granted the defendants may dictate the order in which they are to be tried. See Tex.Crim.Pro. Code Ann. § 36.10.
Ill
Evaluating severance motions that are based on the need for a codefendant’s testimony requires a balancing of the State’s interest in the economy of a joint trial and a criminal defendant’s interest in presenting exculpatory evidence to the trier of fact. Jointly indicted defendants generally should be tried together to avoid unnecessary, duplicative litigation.
Brown, supra,
118
N.J.
at 605,
To reconcile those competing concerns in a given case, the trial court must focus on the substance and quality of the proffered testimony, and attempt to ascertain the testimony’s exculpatory value. The court should distinguish between credible, substantially exculpatory testimony and testimony that is insignificant, subject to damaging impeachment, or unduly vague, conclusory, or cumulative. Where the testimony rendered unavailable by a joint trial is not substantially exculpatory, a defendant has not suffered cognizable prejudice for the purpose of Rule 3:15-2(b). Where, however, the proffered testimony is likely to be significantly exculpatory, denying the defendant’s severance motion could be highly prejudicial to the defendant, and potentially could lead to the conviction of an innocent person. See Dawson, supra, at 1444. When such substantially exculpatory testimony is at stake, procedural convenience is not an adequate justification for a trial court’s decision that precludes a defendant from calling his codefendant to the witness stand.
The same principles apply when a codefendant’s offer to testify is conditioned both on the severance motion being granted
and
on his own case being tried first. Because a code-
*292
fendant is likely to incriminate himself while exculpating his alleged accomplice, the codefendant’s reluctance to provide such testimony until his own trial has concluded is understandable, and finds constitutional support in the Fifth Amendment. For a trial court, the exculpatory value of the proffered testimony remains the focus of the analysis. Thus, if the proffered testimony is substantially exculpatory, the court should accommodate a codefendant’s reasonable request regarding the timing of the separate trials unless there is a compelling reason not to do so.
See State v. Scovil,
159
N.J.Super.
194, 199-201,
The parties in this appeal have urged us to adopt the multi-pronged federal standard,
see supra
at 284-286,
Applying the standard we have adopted to the case at hand, we conclude that the trial court correctly rejected Alex’s severance motion. Notwithstanding Alex’s desire to call Juan to
*294
the witness stand, there was not a sufficient showing that a grant of severance would have altered Juan’s decision not to testify. During the
in camera
hearing, Juan consistently avoided making a commitment to testify at a separate trial for Alex. Even after the court offered to try Juan’s case first, Juan equivocally responded, “I might testify,” “I may testify,” “Most certainly I might testify,” “Maybe,” “I don’t know,” and “I haven’t decided.” A severance motion should not be granted on the basis of a mere possibility that the codefendant will testify at a separate trial.
See, e.g., Lopez, supra,
That Juan’s proffered testimony did not substantially exculpate Alex constitutes additional justification for the trial court’s decision to deny Alex’s severance motion. Although Juan claimed in his affidavit that only he and Noel Manuel were “responsible” for the robbery, Juan admitted to the trial court that Alex was present during the commission of the crime. Absent a more specific explanation of Alex’s role in the robbery, Juan’s affidavit and proffered testimony are not substantially exculpatory, especially in view of Alex’s insistence that he was not present at the scene of the crime. See N.J.S. A 2C:2-6 (providing for accomplice liability). That discrepancy in the brothers’ stories undermines the exculpatory value of the proffered testimony and supports the trial court’s suspicion that the brothers were attempting to use the severance motion as a ploy to get one of them acquitted.
Moreover, the eye-witness testimony that Alex drove the getaway vehicle from the crime scene casts doubt on Juan’s assertion that Alex was not “responsible” for the robbery. We acknowledge that a severance motion should not be denied simply because the court infers that the codefendant’s proposed exculpatory testimony will be less credible than the testimony of the State’s witnesses. Nevertheless, in assessing whether proffered testimony will be substantially exculpatory for purposes of determining whether to grant severance, a trial court necessarily must evaluate the proposed testimony in the context of the apparent weight of the State’s case. Accordingly, a court properly could conclude that
*295
the eye-witness accounts not only are probative of Alex’s complicity in the crime, but also corroborate Juan’s admission that Alex was present at the crime scene. Moreover, the trial court also was entitled to consider that Juan’s credibility would have been subject to impeachment on the basis of his Pennsylvania convictions for aggravated assault, kidnapping, and other offenses.
See Sands, supra,
76
N.J.
at 147,
Because Alex has failed to show that substantially exculpatory testimony would have been forthcoming had his severance motion been granted, he has not demonstrated prejudice sufficient to compel severance under Rule 3:15-2(b). The trial court did not abuse its discretion in denying Alex’s severance motion.
IV
The judgment of the Appellate Division is reversed.
For reversal — Chief Justice WILENTZ, and Justices HANDLER, POLLOCK, O’HERN, GARIBALDI, STEIN and COLEMAN — 7.
For affirmance — None.
