Can I call you back? young girls nudist First, police had to make sure the Y-chromosomes in those DNA samples were a familial match to DiSalvo in order to convince a judge to let investigators disturb his grave. So BPD Sgt. Brian Albert, a surveillance expert, followed nephew Tim DiSalvo to his worksite in Boston and retrieved a water bottle he drank from and left behind. It was a match to the samples collected in the 1964 Beacon Hill murder, excluding 99.9 percent of the male population from suspicion in Mary Sullivan’s killing, Hayes said, and pointing to Albert DiSalvo with near certainty as the man responsible.