 One summer morning, the boy suited up in an 80-pound backpack; by afternoon, the heat had topped 80 degrees, and he was soon staggering, drifting off the trail, and complaining of dizziness and exhaustion.Staffers thought he was faking his symptoms and failed to call 911 until his pulse had stopped; that death is the focus of a negligent homicide investigation.In 2010, a mother and her son sued Aspen alleging that while the son was a student at a boarding school owned by Aspen, Cedars Academy, he was sexually assaulted and threatened by a fellow student.