POLICE OFFICER’S OPINION A HOMICIDE HAD BEEN COMMITTED AND THE VICTIM’S MOTHER’S TESTIMONY ABOUT THE VICTIM’S PERSONAL BACKGROUND SHOULD NOT HAVE BEEN ADMITTED; OPINION ISSUE REVIEWED IN THE INTEREST OF JUSTICE; MANSLAUGHTER CONVICTION REVERSED (FOURTH DEPT).

The Fourth Department, reversing defendant’s manslaughter conviction, determined the investigating officer’s opinion that the death was a homicide and the victim’s mother’s testimony about the personal background of the victim should not have been admitted:

Defendant’s contention that County Court erred in allowing an investigating police officer to testify regarding his opinion that a homicide was committed in this case is preserved for our review only in part … . To the extent that defendant’s contention is unpreserved, we exercise our power to review it as a matter of discretion in the interest of justice … , and we conclude that the court erred in admitting that testimony because it ” ‘usurp[ed] the jury’s fact-finding function’ ” … .

We further agree with defendant that the court erred in permitting the victim’s mother to testify regarding the victim’s personal background, including various aspects of the victim’s life and his family relationships. It is well settled that “testimony about [a] victim[‘s] personal background[] that is immaterial to any issue at trial should be excluded” … and, here, the testimony of the victim’s mother regarding the victim’s personal background was not relevant to a material issue at trial. People v Salone, 2020 NY Slip Op 06903, Fourth Dept 11-20-20