A PennDot contractor pleaded guilty Monday in a bid-rigging scheme, the Attorney General's office announced.
Thanh Nguyen, of King of Prussia, pleaded guilty to one count each of corrupt organizations and theft by deception. A sentencing date has not been scheduled, according to officials.
Nguyen, 62, was accused of stealing $3.6 million from PennDot by falsifying and inflating work reports and failing to perform work his firm was hired to do. 

He was one of a dozen people charged in December 2014 in connection with an over-billing scheme that defrauded the state of at least $1.2 million. The contracts were for work in the Pennsylvania Department of Transportation district that covers Philadelphia and its surrounding suburban counties.

Of the other defendants, one has died and the others have either have either pleaded guilty or been accepted into a first-time offender program.