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
Francisco Guerrero (serial killer) that, according to him, he held over the women. Almost all of his victims were prostitutes, but he did not kill them because of their work; he killed them because they were vulnerable. According to him, ""...women had a duty to be faithful to their men, and female adultery should be punished with the death penalty."" Carlos Roumagnac, one of the first Mexican criminologists, concluded that "Consulado River's Ripper" was a born criminal: His crimes have since been dramatized in 's novel "Carne de Ataud". Francisco Guerrero (serial killer) Francisco Guerrero Pérez (1840–1910), also known as Antonio Prida, was a