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.

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.

The Michigan attorney general has accused the owner of a medical center and three of its employees of ignoring safety standards to make a profit.