boston strangler. >> reporter:@beryl desalvo confessed to being the notorious boston strangler. but police never proved it. investigators may have cracked case. >> a suffolk county judge authorized the exhumation of desalvo's remains. >> reporter: guilt at left in the case of mary sullivan. the 19-year-old was raped and strangled. there were ten other victims between 1962 and '64, terrorizing the boston area, grabbing international headlines and the silver screen. desalvo was sentenced to life for unrelated crimes and stabbed in death in prison. thanks to new technology, authorities say they've matched dna from one of the strangler's