Anthony Levandowski, the man at the center of Google’s epic legal battle with Uber over trade secrets, has agreed to plead guilty to stealing a single confidential document from Google. The guilty plea is likely to lead to a prison sentence of between two and two-and-a-half years.

Levandowski, a gifted engineer, was one of the early stars of Google’s self-driving car project. In 2015, he decided to leave Google to start his own self-driving car startup. According to the plea deal, on his way out the door, Levandowski downloaded thousands of confidential Google documents and transferred them to his personal laptop. Uber acquired the startup a few months later in a deal worth hundreds of millions of dollars.