Video shows a hitman trying to kill a woman with a high-powered crossbow hidden inside a box. The shocking surveillance video was released by Canadian police. It shows a man dressed as a delivery driver and holding a large package. But detectives say he was really a hitman and was ringing the home's doorbell to deliver a fatal attack. Moments after, a woman answered the door, the two exchanged words and the man fired the crossbow. Police say inside the cardboard box was a high-powered crossbow holding a razor-sharp big game arrow, designed to bring down and kill elk and...