A 44-year-old Maryland man told his girlfriend they were going on vacation but actually kidnapped her, tied her up, and watched her die in the Nevada desert. John Matthew Chapman, 44, was sentenced to life in prison on Friday for the killing of Jaime Feden, 33, of Bethel Park, Penn. He was found guilty of kidnapping resulting in death after an eight-day trial in May. “The defendant violated the victim’s trust by luring her away from her family and friends in Pennsylvania and out into the Nevada desert, where he viciously killed her,” said United States Attorney Jason M. Frierson for the Distri…