Boston police are combing through archives for long-lost DNA ?evidence in the Boston Strangler murders and guarding the soon-to-be-reopened grave of longtime suspect Albert DeSalvo after the announcement they've linked him with near certainty to the killing of Mary Sullivan, 19, the last of 11 women whose murders terrified the region half a century ago, the Boston Herald reports. “There's always hope of finding it,” said Sgt. Detective William Doogan, Boston police's cold-case chief. “With this, 49 years old, it kind of opens up the door for a whole lot of other things that people thought were going to go nowhere. And they may yet go nowhere. But the possibility is there.” Investigators, confident that DNA testing had advanced enough to glean good evidence from the Sullivan case files, sent a piece of a blanket and two slides containing bodily fluids taken at her autopsy to crime labs last fall. After an agonizing wait, detectives learned the lab had extracted a man's DNA profile from the blanket, and a mix of that profile and Mary Sullivan's from the fluids. The development appears to put to rest long-lingering doubts about the guilt of the deceased DeSalvo, whose detailed confession was ruled inadmissible in court.