Twenty-three-year old Rosemary Peterson was tied to her bed, cut and stabbed repeatedly, and left to die in the apartment she shared with her boyfriend, Willard Colwell, Jr. It was Dec. 5, 1979. Neighbors heard noises in their Edelweiss Road duplex.
Deputy Chief Dominic Iasparro with the Rockford Police Department says, Actually, the neighbors had called out to them as they heard an argument, said whats going on in there? A male voice said Rose and I are just having an argument. The neighbors called the police. By the time the police got there the suspect had fled and they found Rosemary Peterson who was severely injured.
Police even believe they might have spoken to the killer while they surveyed the crime scene.