WHO KILLED KATHY POTTER & LEE KIRK?

As reported by https://www.facebook.com/ontariocoldcases/posts/kathy-potter-and-lee-kirk-murders/2532933870306312/ and by https://www.websleuths.com/forums/threads/canada-lee -kirk-15-kathy-potter-13-toronto-1-oct-1971.62200/ , Kathy Potter and Lee Kirk were abducted on October 1, 1971 on the way to Richmond Hill. The victims were later strangled and their bodies were found near Valley Farm Road in Pickering, Ontario, Canada. The area is close to Riverside, Deckers Hill and Elizabeth Street,