DETROIT (AP) — A lawyer says he's seeking $50 million in a lawsuit against a Michigan State Police trooper who used a Taser to try to stop a teenager on an all-terrain vehicle.

Damon Grimes died last weekend after he crashed the ATV in Detroit. State police acknowledge that the 15-year-old was struck with a Taser before the crash.

A lawsuit filed Wednesday in federal court accuses the trooper of excessive force. Geoffrey Fieger says the teen wasn't armed and didn't pose a threat to police.

A state police spokesman, Lt. Mike Shaw, declined to comment on the lawsuit. The trooper has been suspended. The results of an investigation will be reviewed by the Wayne County prosecutor.