Jack Levin, Ph.D. (born June 28, 1941) specializes in research on murder, prejudice and hate, sociology of aging and sociology of conflict at Northeastern University in Boston, Massachusetts. He has interviewed and corresponded with brutal killers, such as Hillside Strangler and Charles Manson, and other violent criminals-serial killers and rapists, mass murders, and vicious hatemongers. He is also asked by news and television reports to comment on important occurrences of homicide or hate.