‘Deal with it’: Ex-Oxford Center employee testifies about how safety concerns were dismissed

Andrew McMullen, a former Oxford Center employee, testified that repeated warnings about hyperbaric chamber safety, including static electricity, and children being treated alone, were dismissed by leadership during the time he worked for the center. His employment at the Oxford Center was from 2017-2021, years before Thomas Cooper was killed in the explosion at the Troy facility on Jan. 31, 2025. McMullen testified in court on Jan. 12, 2026, during the preliminary examination of Tamela Peterson, 59, of Brighton, Jeffrey Mosteller, 65, of Clinton Township, Gary Marken, 66, of Spring Arbor and Aleta Moffitt, 61, of Rochester Hills. Their hearing is scheduled to continue on Tuesday, Jan. 13, 2026.