House members on Wednesday grilled General Motors CEO Mary Barra and Anton Valukas, the former U.S. attorney she hired to author the company’s internal report absolving top executives of responsibility for delaying a fatal ignition switch defect in some cars.

This was the first House hearing on the issue in which lawmakers were armed with the 325-page report outlining what went wrong.

Valukas said his report blames “individual and organizational failures” and “a lack of accountability, a lack of urgency and a failure of the company personally charged with safety issues.”

His team found no evidence of a cover-up, Valukas said. Instead, the company erroneously viewed years’ worth of stalling car reports as a consumer convenience issue and nothing more.