BOSTON (AP) - After 16 long years, the arrest of notorious Boston gangster James "Whitey" Bulger appeared to end a long, frustrating manhunt that had embarrassed the FBI and raised questions about its efforts to find one of its most wanted fugitives. But Bulger's capture could be only the beginning of a new scandal for the Boston FBI and others. If Bulger decides to cut a deal with prosecutors, he could implicate an untold number of local, state and federal law enforcement officials, according to investigators who built a racketeering indictment against Bulger before he fled in 1995. "If he...