Jeffrey Mosteller, the safety director at the Oxford Center in Troy, Michigan, pleaded no contest to one count of involuntary manslaughter on Tuesday following the death of a 5-year-old boy in a hyperbaric chamber explosion, Michigan Attorney General Dana Nessel announced.
Under a plea and sentencing agreement submitted to the court, Mosteller will serve between 19 months and 15 years in prison.
The charge stems from a January 31, 2025, incident at the Oxford Center, a facility offering Hyperbaric Oxygen Therapy to children and adults for conditions such as autism, ADHD, and autoimmune diseases. Five-year-old Thomas Cooper was undergoing treatment inside the chamber when it caught fire from the inside and exploded.
According to state officials, Mosteller failed to follow safety guidelines established for the device.
Both the manufacturer, Sechrist, and the National Fire Protection Association (NFPA) maintain strict operational protocols prior to treatment. Investigators determined Mosteller intentionally disregarded these safety measures at the time of the incident.
“A young child lost his life in a completely preventable tragedy because this defendant allowed an outdated device to operate in defiance of safety standards,” Nessel said in a statement. “While no outcome can reverse this loss, it is my hope that this conviction provides a sense of justice to Thomas’s family.”
Mosteller is scheduled to be sentenced on August 13 by Judge Kwamé L. Rowe in Oakland County’s 6th Circuit Court.
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Safety Director In Michigan Pleads No Contest In Fatal Hyperbaric Chamber Explosion