The teen accused of killing his pregnant girlfriend stabbed her more than 50 times, according to police.

Robbie W. Bishop, 19, had threatened to kill Robin M. Anderson, 33, before police found her dead in the living room of a Spokane Valley home she’d been living at with Bishop on Aug. 22, according to a search warrant filed Tuesday in Spokane County District Court.

That search warrant was meant to access unseen footage of a KXLY TV news interview with Bishop in jail, but the news station no longer had the footage when police asked for it Tuesday, said news director Jerry Post.

Bishop is in Spokane County Jail on $1,250,000 bond.

He was released from jail in April on unrelated charges because mental health services didn’t have room for him. Read a story on that here.

He’s to be arraigned tomorrow on one count of second-degree murder.

Look for an in-depth story on Bishop and Anderson this weekend.