The Volkswagen emissions cheating scandal deemed “Dieselgate” is evidence something is “rotten” in the German automaker, a top House Republican charged Thursday.

Rep. Fred Upton, R-Mich., said at a hearing of the House Committee on Energy and Commerce’s Subcommittee on Oversight and Investigation that the company betrayed the trust of regulators, dealers and the public. Upton, the chairman of the Energy and Commerce committee, said he was shocked by the scandal.