Court documents revealed that the woman murdered at the Morgantown Motel was the suspect’s sister. Karol Crosco, 49, of Garrett County, Md., stabbed the woman in the chest and told police he had bought the murder weapon — a kitchen knife, which was found at the scene covered in blood — on the day prior with the intention of killing his sister. Crosco also told police he stole the car specifically to drive to his sister’s motel room.