Ex-safety manager sentenced to 19 months for hyperbaric chamber death of boy

Jeffrey Mosteller, 66, was sentenced to 19 months in prison after pleading no contest to involuntary manslaughter in the January 2025 death of five-year-old Thomas Cooper, who died in a hyperbaric chamber fire in Michigan. The case highlights regulatory and safety failures in medical device operation, but it is a localized legal outcome with no broader market or geopolitical implications.