WASHINGTON — The FBI says 56 law enforcement officers were murdered on duty last year, up eight from 2009. All but one of the 56 officers was slain by someone using a gun. Thirty-eight of them were wearing body armor when killed. The only officer who wasn't a victim of firearms was killed with a vehicle. Fifteen officers were killed in ambushes, eight were investigating suspicious persons, seven were killed in traffic pursuits or stops and six were responding to... (GunPolicy.org)