• FILE - In this Oct. 13, 2015, file photo, a Volkswagen Touareg diesel is tested in the Environmental Protection Agency's cold temperature test facility in Ann Arbor, Mich. A Volkswagen engineer pleaded guilty Friday, Sept. 9, 2016, to one count of conspiracy in the company's emissions cheating scandal. James Robert Liang, of Newberry Park, Calif., entered the plea in U.S. District Court in Detroit. (AP Photo/Carlos Osorio, File)

    FILE - In this Oct. 13, 2015, file photo, a Volkswagen Touareg diesel is tested in the Environmental Protection Agency's cold temperature test facility in Ann Arbor, Mich. A Volkswagen engineer pleaded guilty Friday, Sept. 9, 2016, to one count of ... conspiracy in the company's emissions cheating scandal. James Robert Liang, of Newberry Park, Calif., entered the plea in U.S. District Court in Detroit. (AP Photo/Carlos Osorio, File) (The Associated Press)

  • FILE - This Feb. 14, 2013, file photo, shows the Volkswagen logo on the grill of a Volkswagen on display in Pittsburgh. A Volkswagen engineer pleaded guilty Friday, Sept. 9, 2016, to one count of conspiracy in the company's emissions cheating scandal. James Robert Liang, of Newberry Park, Calif., entered the plea in U.S. District Court in Detroit. (AP Photo/Gene J. Puskar, File)

    FILE - This Feb. 14, 2013, file photo, shows the Volkswagen logo on the grill of a Volkswagen on display in Pittsburgh. A Volkswagen engineer pleaded guilty Friday, Sept. 9, 2016, to one count of conspiracy in the company's emissions cheating scandal.... James Robert Liang, of Newberry Park, Calif., entered the plea in U.S. District Court in Detroit. (AP Photo/Gene J. Puskar, File) (The Associated Press)

  • Volkswagen engineer James Robert Liang, left, leaves court, Friday, Sept. 9, 2016, in Detroit, after pleading guilty to one count of conspiracy in the company’s emissions cheating scandal, Liang has agreed to cooperate in the widening criminal investigation. (Virginia Lozano/Detroit News via AP)

    Volkswagen engineer James Robert Liang, left, leaves court, Friday, Sept. 9, 2016, in Detroit, after pleading guilty to one count of conspiracy in the company’s emissions cheating scandal, Liang has agreed to cooperate in the widening criminal ... investigation. (Virginia Lozano/Detroit News via AP) (The Associated Press)

VW engineer pleads guilty in emissions case, will cooperate

Markets Associated Press

A Volkswagen engineer has pleaded guilty to one count of conspiracy in the company's emissions cheating scandal.

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James Robert Liang of Newberry Park, California, entered the plea Friday in U.S. District Court in Detroit.

A Justice Department official says Liang will cooperate in the ongoing investigation.

Liang, 62, was indicted on one count of conspiracy to commit wire fraud and another count of violating the Clean Air Act. He allegedly helped design the computer software that allowed certain Volkswagen and Audi vehicles with diesel engines to cheat on emissions tests.