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
Petr Zelenka (serial killer) discover the truth. In February 2008, Zelenka was convicted of killing seven patients and attempting to kill 10 others, and sentenced to life imprisonment. Petr Zelenka (serial killer) Petr Zelenka (born February 27, 1976) is a Czech serial killer. Zelenka, a nurse in Havlíčkův Brod, southeast of Prague, murdered seven patients by lethal injection, and attempted to kill 10 others between May and December, 2006. He killed with a hidden vial of heparin — a blood-thinning drug causing internal bleeding when administered in large doses. Zelenka has already confessed and been taken into custody. His lawyer has been quoted as