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
Albert DeSalvo a book, "A Rose for Mary" (2003), in which he expanded upon the evidence—and leads from Kelly's book—to conclude that DeSalvo could not be responsible for her death, and to try to determine her killer's identity. Sharp continues to work on the case for the DeSalvo family. On July 11, 2013, Suffolk County District Attorney Daniel F. Conley stated that DNA testing had revealed a "familial match" between DeSalvo and forensic evidence in the Sullivan killing, leading authorities to request the exhumation of DeSalvo's body in order to provide a definitive forensic link of DeSalvo to the murder of Mary