News Autopsies show 3 Marines found in car near Camp Lejeune died of carbon monoxide poisoning July 26, 2023Grace Hauck, Chase Jordan and Sophie Carson, USA TODAYComments Off on Autopsies show 3 Marines found in car near Camp Lejeune died of carbon monoxide poisoning Autopsies show three U.S. Marines died from carbon monoxide poisoning in North Carolina over the weekend, officials said Wednesday.