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THE CONCLUSIONS OF THE PEOPLE’S ACCIDENT-RECONSTRUCTION EXPERT (WHO WAS NOT CALLED TO TESTIFY AT TRIAL) WOULD HAVE HAD AN IMPACT ON THE CONCLUSIONS DRAWN BY THE DEFENSE ACCIDENT-RECONSTRUCTION EXPERT; WITHHOLDING THE EVIDENCE FROM THE DEFENSE WAS A BRADY VIOLATION REQUIRING REVERSAL AND A NEW TRIAL (THIRD DEPT).

The Third Department, reversing defendant’s vehicular homicide and manslaughter convictions and ordering a new trial, determined expert opinion evidence constituted Brady material which was wrongfully withheld from the defense. The People’s accident-reconstruction expert in question, who did not testify at the trial, was named Pinzer. The defense accident-reconstruction expert, named Silver, testified in the CPL 440 hearing that his opinion would have been influenced by Pinzer’s findings. The driver lost control of the car which flipped several times. The defendant survived and the other occupant was ejected from the car and died. The withheld expert evidence called into question various aspects of law enforcement’s investigation of the accident, the speed of the car at the time of the accident, for example:

Silver … testif[ied] at the hearing that, although knowledge of [Pinzer’s conclusions] would not have changed his ultimate conclusion as to who was operating the vehicle, it did have a direct and significant impact on his methodology and findings. For example, had he known that the data was corrupted, he would have performed his analysis differently and explained to the jury why law enforcement’s data was unreliable; he would have also been able to rebut any challenge to his credibility for the use of multiple formulas and his own data. He also averred that, in light of the new information regarding the data, his trial testimony as to the vehicle’s speed prior to the accident — 55 to 65 miles per hour — was overstated. * * *

… [I]n view of the character of the withheld information here, the misleading disclosure that was made, the manner in which the prosecutor elected to act on Silver’s testimony of defendant’s innocence and the circumstantial nature of this case, we agree with defendant that Pinzer’s opinion … must be considered favorable to the defense. * * *

… Pinzer was an arm of the prosecution, acting on the government’s behalf, and the People had a duty to learn of his opinion, which “directly relates to the prosecution or investigation of . . . defendant’s case” … . * * *

… [T]here was no reasonable possibility that the People’s failure to disclose Pinzer’s opinion did not impact the verdict … . The prosecutor’s cross-examination of Silver and his statements in summation — which sought to both bolster the legitimacy of police work that he should have known was faulty and impugn the credibility of Silver for not exclusively relying upon same — “compounded the prejudice” to defendant … . People v Hoffman, 2023 NY Slip Op 06004, Third Dept 11-22-23

Practice Point: Here, in this vehicular homicide case, the People did not disclose the conclusions reached by their accident-reconstruction expert, who was not called to testify at trial. The defense accident-reconstruction expert would have changed some of his conclusions had he been aware of the People’s expert’s analyses. Withholding the People’s expert’s findings from the defense was a Brady violation requiring reversal and a new trial.

 

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