Updated

The family of an unarmed man shot and killed by an undercover Philadelphia police officer has sued the city.

The family of Richard Ferretti says in a lawsuit filed Monday in federal court he was driving around looking for a parking spot in May 2016 when officers tried to stop him.

Police say they were responding to a call about a suspicious vehicle. They allege Ferretti refused to stop his minivan and that's when Officer Shannon Coolbaugh fired at him.

Witnesses say they heard Ferretti yelling, "I'm stopping!"

Coolbaugh remains on desk duty as a grand jury determines whether he should face charges

Commissioner Richard Ross says he has concerns about the tactics used the night Ferretti was shot.

Prosecutors aren't commenting.

The lawsuit seeks more than $150,000 in damages.

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This story has been corrected to show the man's surname was Ferretti, not Feretti.