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 In a 2005 article Anthony Walsh, professor of criminal justice at Boise State University, argued a review of post-WWII serial killings in America finds that the prevalence of minority serial killers has typically been drastically underestimated in both professional research literature and the mass media. As a paradigmatic case of this media double-standard, Walsh cites news reporting on white killer Gary Heidnik and African-American killer Harrison Graham. Both men were residents of Philadelphia, Pennsylvania; both imprisoned, tortured, and killed several women; and both were arrested only months apart in 1987. "Heidnik received widespread national attention, became the subject of books