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
Władysław Mazurkiewicz (serial killer) Władysław Mazurkiewicz (serial killer) Władysław Mazurkiewicz (January 31, 1911 – January 29, 1957) was a Polish serial killer from the post–World War II Kraków, who also owned property in Warsaw. His economic standing and polite manners in Stalinist Poland earned him the nickname "the Gentleman Murderer" ("elegancki morderca"), also ""piękny Władek"" (the Handsome Władek). Mazurkiewicz was arrested in 1955 and charged by the prosecution with six murders and two more attempted murders. He was convicted of killing four men and two women including Wiktor Zarzecki, Władysław Brylski, Józef Tomaszewski, and millionaire Jerzy de Laveaux along with his wife Jadwiga de