The government alleges Anthony Levandowski stole Waymo documents in 2016 while he worked there as an engineer, then took them to Uber.
Uber had been accused of stealing trade secrets from Waymo.
“You’re making the impression that this is a total cover-up," the judge told Uber's lawyers. "Your client is in a bad way now.”
The future of the company's self-driving unit hangs on the judge's decision.
Anthony Levandowski moves to a different job at the company as a lawsuit filed by rival Waymo heads for trial.
While Uber was talking, the Google spin-off was rolling.
It's Uber versus Google in a tale of corporate intrigue.
Uber poached several top minds from Google's self-driving project.