A back-seat passenger in the car of a groom-to-be killed by police testified yesterday that he never heard any warnings before officers unleashed a fatal 50-shot barrage.

Trent Benefield, who was hit three times in the legs, recalled that moments after the shooting, he was held at gunpoint and handcuffed — even as he pleaded for help.

“I didn’t do nothing,” he said he told an officer. “I’ve been shot.”

The testimony at the trial of three police officers charged in the killing of Sean Bell contradicted the account of the shooters, who insist they shouted commands to halt.

Bell, 23, was killed outside a topless bar in Queens on the morning of November 25, 2006. Mr. Benefield and another passenger, Joseph Guzman, survived serious wounds.

Detectives Gescard Isnora and Michael Oliver have pleaded not guilty to manslaughter. Detective Marc Cooper has pleaded not guilty to reckless endangerment. Wearing a dark suit and his hair in braids, Benefield, 24, said he only heard the patron say, “I’m from ‘Far Rock,'” and Mr. Guzman respond, “I’m from Far Rockaway, too,” referring to a neighborhood in Queens.

He described being in the back seat of Bell’s car when, through the windshield, he suddenly saw a man appear and point a gun at Bell.

As Mr. Benefield covered his eyes in fear, he said, he heard Mr. Guzman, yell, “Go! Go! Go!” followed by the sound of a collision and rapid gunfire. He claimed he had no idea who the shooters were until someone told him at the hospital.

During cross-examination, Mr. Benefield was peppered with questions about his admitted marijuana habit, his $50 million lawsuit against the city, and previous statements that contradicted his testimony.

Mr. Benefield gave no clear explanation for why he previously told investigators that Bell was driving recklessly before he was shot, and that he heard the patron outside the bar tell Bell’s group, “I’ll shoot you.”