Kenneth Erskine is the only serial killer to be considered for parole. He is also the only killer to have his seven murder charges commuted to manslaughter. Whilst in prison, he also saved the life of another famous murderer. 

Yet, despite this, the fact remains that Erskine killed between seven and eleven older people between April and July of 1986. He broke into their house, strangled them and sexually assaulted the majority.