Former safety manager sentenced to 19 months over fatal hyperbaric chamber fire

The short version

• Jeffrey Mosteller was sentenced to 19 months in prison after pleading no contest to involuntary manslaughter in the death of 5-year-old Thomas Cooper.[The Guardian · NBC News]
• Cooper died in January 2025 after a hyperbaric oxygen chamber caught fire during treatment at the Oxford Center in Michigan.[The Guardian · NBC News]
• Three other former clinic employees face criminal charges and remain pending trial, while the boy's parents have filed a $100 million lawsuit against the facility and the chamber manufacturer.[The Guardian · NBC News]

Key facts

• Jeffrey Mosteller received a 19-month prison sentence in Oakland County circuit court after pleading no contest to involuntary manslaughter.[The Guardian · NBC News]
• Thomas Cooper died in January 2025 during hyperbaric oxygen therapy for sleep apnea and ADHD at the Oxford Center in Michigan.[The Guardian · NBC News]
• An expert who reviewed video footage reported that the fire ignited from a static electricity spark created when the child shifted a sheet off a mattress in the oxygen-filled chamber.[The Guardian]
• State prosecutors accused the Oxford Center of deliberately ignoring safety protocols established by the National Fire Protection Association and chamber manufacturer Sechrist Industries.[NBC News]
• Three other former facility workers, including the clinic's founder, face criminal charges and are awaiting trial.[The Guardian · NBC News]
• Cooper's parents launched a $100 million civil suit against the Oxford Center and Sechrist Industries.[The Guardian · NBC News]

Sources

Outlet counts describe coverage, not independent confirmation. Reports may share a wire service or original source.

• Man sentenced to prison in killing of 5-year-old in hyperbaric oxygen chamberNBC News - Top Stories
• Ex-safety manager given 19 months’ prison over five-year-old’s hyperbaric chamber fire deathThe Guardian - US