DETROIT (AP) A high school hockey coach honored as one of Michigan's best has pleaded guilty to possessing child pornography.

Robert Bopp admitted his crimes Thursday before U.S. District Judge Patrick Duggan. He faces a minimum of 15 years in prison for the charges, which emerged from a sexual assault investigation. He pleaded guilty to two counts of producing child pornography and another for attempting to produce it.

Bopp is expected to plead guilty in February to state charges related to sexually assaulting a teen boy.

Bopp was fired as coach at Grosse Pointe South High School after being charged in June. He led the Blue Devils to a state championship game in 2007 and is a member of the hall of fame for Michigan prep hockey coaches.