BOSTON (AP) — A former Boston church official who claimed in an autobiography that he was an enforcer for gangster James "Whitey" Bulger pleaded guilty on Tuesday to federal charges that he looted his church's assets. The U.S. Attorney's office said MacKenzie pleaded guilty before U.S. District Judge Dennis Saylor IV to 13 counts including racketeering conspiracy, racketeering, mail fraud, wire fraud and money laundering. Bulger is serving life in prison after being convicted last year on racketeering charges that tied him to 11 murders and other gangland crimes from the 1970s and '80s.