A police officer stopped a truck suspecting that it was being used to smuggle drugs so he handcuffed the 3 suspects and put them in his patrol car while he searched the truck. So far so good, one slight problem though he'd left the engine running and the keys in the ignition. The suspects promptly drove off in the patrol car and made their escape. What an idiot :)

http://www.reuters.com/article/oddlyEnoughNews/idUSN2541132320070926