Albert DeSalvo F. Conley said he expected investigators to find an exact match when the evidence is compared with his DNA. On July 19, 2013, Suffolk County DA Daniel F. Conley, Mass. Attorney General Martha Coakley and Boston Police Commissioner Edward F. Davis announced that DNA test results proved DeSalvo was the source of seminal fluid recovered at the scene of Sullivan's 1964 murder. Though DeSalvo was conclusively linked to Mary Sullivan's murder, doubts remain as to whether he committed all of the Boston Strangler homicides — and whether another killer could still be at large. When he confessed, people who knew
Serial killer backed by the families of murder victims and "Son of Sam laws" existing in some states that prevent murderers from profiting from the publicity generated by their crimes. Such memorabilia includes the paintings, writings, and poems of these killers. Recently, marketing has capitalized even more upon interest in serial killers with the rise of various merchandise such as trading cards, action figures, and books such as "The Serial Killer Files: The Who, What, Where, How, and Why of the World's Most Terrifying Murderers" by Harold Schechter, and "The A-Z Encyclopedia of Serial Killers" by Schecter and David Everitt. Some serial