Albert DeSalvo F. Conley said he expected investigators to find an exact match when the evidence is compared with his DNA. On July 19, 2013, Suffolk County DA Daniel F. Conley, Mass. Attorney General Martha Coakley and Boston Police Commissioner Edward F. Davis announced that DNA test results proved DeSalvo was the source of seminal fluid recovered at the scene of Sullivan's 1964 murder. Though DeSalvo was conclusively linked to Mary Sullivan's murder, doubts remain as to whether he committed all of the Boston Strangler homicides — and whether another killer could still be at large. When he confessed, people who knew
William MacDonald (serial killer) William MacDonald (serial killer) William MacDonald, (17 June 1924 – 12 May 2015), known as "the (Sydney) Mutilator", was classed as Australia's first true serial killer. MacDonald was born in Liverpool, England in 1924. Between 1961 and 1962 MacDonald terrorised Sydney with a string of gruesome murders before being apprehended while working as a porter at Melbourne's Spencer Street railway station on 13 May 1963. His modus operandi was to select his male victims at random (mostly derelicts), lure them into a dark place, violently stab them dozens of times about the head and neck with a long bladed knife,