What began as an investigation into the July 2016 derailment of a Washington, D.C., Metro train has uncovered several years’ worth of falsified track inspection records, resulting in dismissals or disciplinary action for more than half of the system’s track inspection staff.

Metro General Manager and CEO Paul J. Wiedefeld on Jan. 26 told the Washington Metropolitan Area Transit Authority’s Safety Committee that sixteen track inspectors and five supervisors have been fired as a result of a recently completed review of inspection records from the past three years. Fourteen others were suspended.