Uber Boss Testifies He ‘Could Not Trust’ Ex-Security Chief

Dara Khosrowshahi, Uber’s chief executive, said in court on Friday that he had fired Joe Sullivan, the former Uber security chief who is on trial over a 2016 security breach, because he could no longer trust him.

“He was my chief security officer, and I could not trust his judgment anymore,” Mr. Khosrowshahi said of Mr. Sullivan in a San…