"I was actually in the parking lot when the chamber exploded, so I kind of saw everything happening," she said. "I was kind of numb, shocked, sick to my stomach."

Troy police say Tamela Peterson ran away when asked for her cellphone after Thomas Cooper died in a hyperbaric chamber fire at the Oxford Center.

An Oakland County health clinic where a 5-year-old boy was killed when a hyperbaric chamber exploded reportedly has a history of fraud investigations, evidence tampering and witness intimidation.

The CEO of the Oxford Center in Troy is accused of sending texts mocking a 5-year-old boy while he was on fire after a hyperbaric chamber exploded. Tamela Peterson and three other employees have been charged in connection with the explosion that killed Thomas Cooper.

Tamela Peterson, 58, of Brighton, is one of three employees charged with second-degree murder with an alternate charge of manslaughter, to be determined by the jury.

Prosecutors said a safety manager at the Oxford Center conducted “his own experiments” on a hyperbaric chamber to prove to employees it was safe prior to a deadly explosion that killed a 5-year-old boy.