PHILADELPHIA — A gun owned by Indianapolis Colts star Marvin Harrison was used in an April shooting, but investigators still can't determine who pulled the trigger, the city's chief prosecutor said today.

Five of the six bullet casings found at the North Philadelphia shooting scene came from Harrison's weapon, but investigators have conflicting witness accounts of who fired it, Philadelphia District Attorney Lynne Abraham said.

No charges have been filed in the April 28 shooting and the investigation remains open, Abraham said.

The victim has sued Harrison and law enforcement will be keeping tabs on that proceeding to see if any new evidence emerges that could help the criminal investigation, Abraham said.

The shooting happened near a North Philadelphia car wash owned by Harrison that is about a half-mile from a bar he also owns.