Toronto police say they have linked three cold cases from the 1980s and identified the killer of three women over the span of five years as the same man. Through DNA testing, or investigative genetic genealogy, police have identified Kenneth Smith as the killer of Christine Prince, Gracelyn Greenridge and Claire Samson, Det. Sgt. Steve Smith said in a video statement provided by Toronto police Thursday. The three women were killed in separate incidents between 1982 and 1987, Smith said.