Question: What started on 18 September 2015, when the United States Environmental Protection Agency (EPA) issued a notice of violation of the Clean Air Act to German automaker Volkswagen Group, that had an American attorney, specializing in mediation and alternative dispute resolution oversee their U.S. compensation of VW diesel owners affected?
Sentence (from "Volkswagen emissions scandal"): The agency had found that Volkswagen had intentionally programmed turbocharged direct injection (TDI) diesel engines to activate some emissions controls only during laboratory emissions testing.
Relevant evidence: No