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The ongoing preliminary examination regarding the tragic death of a teenager in an Oakland County hyperbaric explosion took a pivotal turn this week. On December 1, 2025, Majid Mashayekh, the vice president of quality assurance for Sechrist Industries, took the stand to provide key testimony concerning the incident.
Four individuals have been charged in connection with the explosion that took the life of 16-year-old Thomas Cooper. Those charged include Tamela Peterson, 58, from Brighton; Jeffrey Mosteller, 65, of Clinton Township; Gary Marken, 66, of Spring Arbor; and Aleta Moffitt, 60, of Rochester Hills. The court proceedings have garnered significant local attention due to the severity of the incident and the young victim’s tragic fate.
During his testimony, Mashayekh addressed the safety protocols and manufacturing practices followed by Sechrist Industries, the manufacturer of the hyperbaric chamber involved in the accident. His assertions not only aimed to clarify the company’s commitment to safety but also sought to alleviate some responsibility from those charged. The courtroom was filled with a mix of grief, anger, and curiosity as details of the incident unfolded.
Prosecutors allege negligence on the part of the accused, claiming that insufficient safety measures led to the fatal explosion. As the examination continues, it aims to unravel the complexities surrounding the case and seek justice for the Cooper family.
The community remains on edge, eagerly awaiting the conclusions of this examination, which could have lasting implications for regulations governing hyperbaric chambers and the responsibilities of those who operate them.
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