More than 50 officers in Manhattan, Queens and Brooklyn will voluntarily wear the cameras.
The officer, Curtis Johnson, 28, of the 103rd Precinct, died on Monday, police said.
The gun buyback program will take place in Jamaica on June 7.
The Ford Econoline vans are stolen for parts or to commit other crimes, police said.
Marisha Cheong had plans of owning an interior design firm before she vanished and was found dead.
The body of Marisha Cheong was found across from Bayside Avenue in Queens, police said.
Police Officer Salisha Alirasul allegedly refused a breath test, the NYPD says.
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