Ex-FBI Agent Faces Trial in 1982 Murder John J. Connolly was hundreds of miles away in 1982 when gambling executive John Callahan's bullet-riddled body was discovered in the trunk of his Cadillac at Miami's airport. The admitted shooter said he never met Connolly, the disgraced ex-FBI man at the heart of the agency's sordid dealings with Boston's Winter Hill Gang. Yet Connolly will stand trial on murder and conspiracy charges this month as if he had pulled the trigger himself, because prosecutors say he secretly gave information that was crucial in setting up the hit. Jury selection is to begin Monday in Connolly's trial, which figures to rehash some of the ugliest episodes in the Boston FBI's handling of the gang, once led by James J. "Whitey" Bulger and convicted killer Stephen "the Rifleman" Flemmi. For years, both were top FBI informants on rival Italian mobsters. Connolly was their handler, and he made sure they were shielded from prosecution for murder and many other crimes. That eventually sent him to federal prison on a racketeering conviction. A congressional investigation concluded in 2003 that the FBI's relationship with Bulger and his cohorts "must be considered one of the greatest failures in the history of federal law enforcement."....