NEW YORK -- Three detectives were acquitted of all charges Friday in the 50-shot killing of unarmed groom-to-be Sean Bell on his wedding day, a case that put the NYPD at the center of another dispute involving allegations of excessive firepower.

Justice Arthur Cooperman delivered the verdict in a Queens courtroom packed with spectators, including victim Sean Bell's fiancee and parents, and at least 200 people gathered outside...