US Forest Service Ranger Robert Dawson leads Boy Scout Troop 370, Mammoth Lakes, California, on a snowshoe hike along Deadman Creek the second Saturday in December every year. Last year he led them to their first corpse. A snowmobile had crashed into a tree eight feet from the water. An unconscious man with a bloody face lay in the snow next to the machine, and a woman lay face down in the creek near him. Forty-three-year-old Rex Andrews, a popular...