Casey Sherman, nephew of homicide victim Mary Sullivan, faces reporters during a news conference at Boston Police headquarters, Thursday, July 11, 2013. Investigators helped by advances

 

              Casey Sherman, nephew of homicide victim Mary Sullivan, faces reporters during a news conference at Boston Police headquarters, Thursday, July 11, 2013. Investigators helped by advances
Casey Sherman, nephew of homicide victim Mary Sullivan, faces reporters during a news conference at Boston Police headquarters, Thursday, July 11, 2013. Investigators helped by advances in DNA technology finally have forensic evidence linking longtime suspect Albert DeSalvo to Sullivan, the last of the 1960s slayings attributed to the Boston Strangler. A likeness of Sullivan appears on a chart behind right. (AP Photo/Steven Senne)