According to Business Times , Stadler’s release was denied by a German federal court who found that the claims of the prosecutors – namely that he knew about and ignored emission cheating – are backed by evidence. Stadler was arrested by German prosecutors on June 18, and is suspected of having concealed evidence in the now three-year-long emissions scandal. The executive is said to have allowed rigged engines to be fitted into cars despite knowing they were tampered with."He allowed the engines to be deployed and to be sold despite knowing about the manipulation or deliberately turning a blind eye on the manipulation," the courts said in a document according to the source.Audi is involved in Volkswagen’s emissions scandal ever since its onset. The carmaker is accused of having tampered with at least 210,000 diesel cars with a so-called defeat device, which allowed them to trick emission measuring tools. The practice is said to go back as far as 2009.Stadler is the first high-ranking Volkswagen Group executive to be charged in Europe as part of the Dieselgate scandal. Ever since the scandal broke, VW has denied top-level executives were involved in the cheating and subsequent cover-up.Back in May, the U.S. Department of Justice (DoJ) formally charged former VW CEO Martin Winterkorn with conspiracy to defraud the U.S. government and customers, wire fraud, and conspiracy to violate the Clean Air Act.According to the papers filed in court, the CEO was at one point informed of the illegal practices of the company and decided to cover them up.One day after his arrest, Volkswagen removed Stadler from his position on the group’s Supervisory Board and from Audi , at Stadler’s request. His place was taken by Abraham Schot.