Audi boss Rupert Stadler will soon be questioned over his role in Volkswagen’s diesel emissions scandal.

Stadler will be questioned by U.S. law firm Jones Day and has been brought into the investigation after witnesses suggested he was involved in dieselgate.

It is reported that soon after Stadler became Audi chairman of the board and chief executive officer of Audi in January 2010, he was informed about the VW Group’s cheating software on the 3.0-liter V6 diesel used by Audi.

When the scandal initially broke in September last year, Stadler denied any knowledge about how engineers were manipulating emissions figures. Nevertheless, the Volkswagen Group supervisory board has ordered Stadler be questioned, reports Autocar.

In recent weeks, the fall out from the scandal has started to shift to the individuals responsible. A few days ago, Audi’s research and development boss Stefan Knirsch was suspended and last week, a VW engineer pleaded guilty to numerous charges, including violating the US Clean Air Act.

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