A Massachusetts prosecutor says investigators have linked longtime suspect Albert DeSalvo to the last of the 1960s slayings attributed to the Boston Strangler. Mary Sullivan, 19, was found strangled in her Boston apartment in January 1964. She was the last of 11 women whose deaths were attributed to the Boston Strangler. She was the only victim for which DNA evidence is available. DeSalvo confessed to the killings but was never convicted. He was sentenced to life in prison on other charges and was stabbed to death there in 1973. DNA produced a "familial match" with DeSalvo. His remains are being exhumed and Conley says he expects an exact match.