U.S. prosecutors are seeking a three-year prison term for Robert Liang, one of the Volkswagen AG (VLKAY) engineers who plead guilty to use devices designed to cheat diesel emissions tests. 

Prosecutors say that Liang was aware that the German carmaker was using software to cheat on emission tests on nearly 600,000 diesel vehicles. However, the government also acknowledges that Liang is not the mastermind behind the scandal, U.S. News reported. 

Liang is scheduled to be sentenced Friday in federal court in Detroit Friday.

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