72-year-old John Martorano is the government 's star witness against Bulger . But when trusted FBI contact John Connolly indicated that Callahan was going to be pressured by the government to testify about the murder , the Winter Hill partners , with Martorano outvoted , decided it was too risky for Callahan to live . Score: 6 He testifies that Bulger was directly involved in some killings . `` A serial killer kills because they like it ... I never had any joy in it , '' Martorano says .
72-year-old John Martorano is the government 's star witness against Bulger . Score: 6 He testifies that Bulger was directly involved in some killings . `` A serial killer kills because they like it ... I never had any joy in it , '' Martorano says .