Authorities say DNA tests on the remains of a man who once claimed to be the Boston Strangler confirm he killed the woman believed to be the serial killer's last victim.

Albert DeSalvo admitted to killing Mary Sullivan and 10 other women in the Boston area between 1962 and 1964 but later recanted. He was later killed in prison.

Authorities said recently that new technology allowed them to test DNA from the scene of Sullivan's death and get a match with DeSalvo that excluded 99.9 percent of suspects.

Investigators unearthed his remains a week ago to confirm. A lawyer for DeSalvo's family has said even a perfect match wouldn't mean he killed Sullivan.

Law enforcement officials disagree about whether the same person killed all the women whose deaths were connected to the Strangler.