Who is charged in the death of Thomas Cooper?

Tamela Peterson (CEO), Jeff Mosteller (safety director), Gary Marken (management assistant), and Aleta Moffitt (chamber operator) are charged.

What safety failures are alleged in the hyperbaric chamber incident?

Experts testified that The Oxford Center failed to use essential grounding straps, a critical safety measure.

What is a hyperbaric chamber and what happened to Thomas Cooper?

A hyperbaric chamber provides high-oxygen therapy. Five-year-old Thomas Cooper died in an explosion in January.

Home / Crime and Justice / Hyperbaric Chamber Death: Trial Continues

Hyperbaric Chamber Death: Trial Continues

2 Dec, 2025

•

Summary

CEO, safety director charged with murder.
Expert testimony highlights critical safety failures.
Grounding straps deemed essential for static prevention.

Hyperbaric Chamber Death: Trial Continues

The legal proceedings concerning the death of 5-year-old Thomas Cooper in a hyperbaric chamber explosion are ongoing. Four individuals, including the CEO, safety director, and a management assistant, are facing second-degree murder charges. The operator of the chamber has been charged with manslaughter and falsifying records.

During Monday's preliminary examination, safety experts testified that The Oxford Center did not adhere to industry standards. Key failures included the absence of grounding straps, which are vital for preventing static electricity buildup and potential sparks within the chamber. Evidence suggested the child was not properly grounded at the time of the incident.

Further testimony revealed that the hyperbaric chamber may have reached its product life expectancy. Questions remain regarding potential technician error or issues with the chamber's sale before the tragic event. The hearing is set to continue.