A newly released letter from the Department of Justice has formally acknowledged that federal prosecutors have an open criminal investigation into Uber. Ars Technica reports: Late last month, as part of the proceedings in the high-profile and ongoing Waymo v. Uber trade secrets lawsuit, U.S. District Judge William Alsup said that on November 22 he had received a letter from San Francisco-based federal prosecutors. It is very unusual for a judge in a civil case to be apprised of a pending criminal investigation involving one of the litigants. In a separate November 28 letter sent to Judge Alsup, Acting U.S. Attorney Alex Tse asked that the first letter not be made public. The judge unsealed both letters on Wednesday. The first letter was signed by two prosecutors, Matthew Parrella and Amie Rooney. Those attorneys are assigned to the Computer Hacking and Intellectual Property (CHIP) Unit at the United States Attorney's Office in San Jose. [T]he letter could mean Uber and/or its current or former employees may be under investigation for possible crimes under the Computer Fraud and Abuse Act, a longstanding anti-hacking law.