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Jury in the trial of Guy Rivera expected to begin deliberations Wednesday

The jury in the trial of Guy Rivera, accused of killing NYPD Detective Jonathan Diller, is expected to start deliberating on Wednesday.

Cecilia Dowd

Mar 31, 2026, 6:27 AM

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Two years after NYPD Detective Jonathan Diller, of Massapequa Park, was shot and killed in in the line of duty during a Queens traffic stop, a jury is set to decide whether his accused killer, Guy Rivera, is guilty of murder and other charges.

The prosecution and defense gave closing arguments Tuesday. It was difficult for Diller's widow, Stephanie, who put her hands over her ears multiple times throughout the summations.

Both sides focused on intent, which is necessary to convict on murder in the first degree.

Prosecutor John Kosinski told jurors that Guy Rivera "chose the deadliest of choices" and said his choices were "intentional," while defense attorney Jamal Johnson said, "there’s no evidence that Mr. Rivera set out to kill an NYPD police officer."

The defense has argued the gun's discharge was unintentional.

New York City PBA President Patrick Hendry attended closing arguments, along with dozens of NYPD officers.

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