A Michigan safety manager has learned his sentence after pleading guilty over a hyperbaric chamber explosion that killed a five-year-old boy, Thomas Cooper. Gary Mosteller had been responsible for overseeing safety at the facility where the device exploded, and the case has drawn scrutiny over how such treatment chambers are regulated and operated.

The article does not provide further verifiable detail beyond the headline, as the underlying page content could not be retrieved in full. Key facts, including the exact sentence handed down, the circumstances of the explosion, and the specifics of Mosteller's plea, are not available from the text provided.