4 charged in death of 5-year-old boy in hyperbaric chamber explosion

Four people have been charged in the death of a 5-year-old boy who was killed inside a pressurized oxygen chamber that exploded at a suburban Detroit medical facility.

Four people have been charged in the death of a 5-year-old boy who was killed inside a pressurized oxygen chamber that exploded at a suburban Detroit medical facility. Thomas Cooper from Royal Oak, Michigan, was pronounced dead at the scene. His mother was standing next to the chamber and suffered injuries to her arms when it exploded January 31 at the Oxford Center in Troy. Online court records show the center’s founder and chief executive, Tamela Peterson, is charged with second-degree murder. The other defendants are Gary Marken, 65, and Gary Mosteller, 64, charged with second-degree murder and involuntary manslaughter; and Aleta Moffitt, 60, charged with involuntary manslaughter and intentionally placing false medical information on a medical records chart. Arraignments were scheduled Tuesday afternoon in Troy District Court, Lt. Ben Hancock said. The case is being prosecuted by Michigan Attorney General Dana Nessel and details were expected to be released during a late morning news conference. Raymond Cassar, Marken’s attorney, said the second-degree murder charge comes as “a total shock” to him and his client. “For fairness, he is presumed innocent,” Cassar said. “This was a tragic accident and our thoughts and our prayers go out to the family of this little boy. I want to remind everyone that this was an accident, not an intentional act. We’re going to have to leave this up to the experts to find out what was the cause of this.”