Oakland County hyperbaric chamber explosion: All 4 charged workers released on bond

5-year-old boy killed in explosion at The Oxford Center

All four people charged in the death of a 5-year-old boy inside a hyperbaric chamber at an Oakland County medical facility have been released on bond.

The CEO and founder of The Oxford Center -- the health care facility where the child died in a hyperbaric chamber explosion -- posted bond on Wednesday.

According to court records, Tamela Peterson posted her $2 million bond and was released from jail just after 1 p.m. on April 9, 2025.

Thomas Cooper, 5, was receiving treatment inside a hyperbaric chamber at the Oxford Center in Troy on Jan. 31, 2025, when it exploded, killing him.

Peterson was charged with second-degree murder and involuntary manslaughter.

Read more: The text, photos Oxford Center CEO is accused of sending after 5-year-old died in hyperbaric chamber

Three other workers have also been charged and posted bond, as well.

The center’s safety manager, Jeffrey Mosteller, 64, of Clinton Township, was released on March 31. He was initially given a $250,000 bond, but it was lowered to $50,000.

Gary Marken, 65, of Spring Arbor, the primary management assistant, and Aleta Moffitt, 60, of Rochester Hills, posted bond and were both released early in March. Marken was given a $250,000 bond, while Moffitt received a $100,000 bond.

Marken and Mosteller were also charged with second-degree murder, while Moffitt was charged with involuntary manslaughter and falsifying medical records.

All four defendants are expected to appear in court again on April 30.

Click here for all of our coverage on the hyperbaric chamber explosion.


About the Author
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Samantha Sayles is an Oakland University alumna who’s been writing Michigan news since 2022. Before joining the ClickOnDetroit team, she wrote stories for WILX in Lansing and WEYI in Flint.