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
Serial killer Jr., Peter Kürten, Clifford Olson, Ottis Toole, Rodney Alcala, Donald Henry Gaskins, Peter Tobin, Albert Fish, Fred West, Richard Ramirez, David Berkowitz, Aileen Wuornos, Edmund Kemper, Charles Starkweather, Rosemary West, David Parker Ray, Paul Bernardo, Dennis Rader, and Gary Ridgway. Ed Gein is often included on such lists, but with two victims most authorities would not classify him as a serial killer. 76% of all known serial killers in the 20th century were from the United States. Some commonly found characteristics of serial killers include the following: There are exceptions to these criteria, however. For example, Harold Shipman was a