Jeffrey Mosteller, 66, a former safety manager at the Oxford Center (an alternative healthcare clinic in Troy, Michigan, that treats conditions such as autism and ADHD using hyperbaric oxygen therapy), has been sentenced to 19 months in prison after pleading no contest to involuntary manslaughter. The sentence relates to the January 2025 death of five-year-old Thomas Cooper, who was incinerated within seconds when a static electricity spark from a dislodged sheet ignited a flash fire inside the oxygen-rich pressurised chamber; his mother suffered serious burns attempting to rescue him. Three other Oxford Center employees — including founder Tamela Peterson, who faces a second-degree murder charge — remain awaiting trial, and Cooper's parents have filed a $100 million wrongful death lawsuit against the clinic and the chamber's manufacturer.