Gelsenkirchen - A man accidentally shot and killed his sister-in-law while celebrating the start of the new year, according to German police. The man had been playing with a revolver his wife had found in the street during a firework display ringing in the new year. Unaware that it was real, he inadvertently fired a round which hit his wife's sister standing next to him. The 43-year-old woman died at the scene.