Evidence continues to mount against ex-mob boss James "Whitey" Bulger.
The prosecution's star witness and former hitman John Martorano took the stand again today, telling the court for the first time that Bulger wasn't just an accessory to murder, but that the former head of Boston's Irish mom also pulled the trigger.
Bulger is accused of drug dealing, extortion and 19 murders committed while he was a prized FBI informant.
OutFront tonight: Boston Globe Reporter Kevin Cullen. Cullen is the author of "Whitey Bulger, America's Most Wanted Gangster and the Manhunt that Brought him to Justice."