In a critical move for its antitrust case against Google, the U.S. government has summoned Nick Turley, head of product at ChatGPT, to testify. This comes after a court found Google to hold a monopoly in search. The Department of Justice (DOJ) aims to demonstrate barriers faced by competitors like OpenAI and Microsoft. Turley will address topics such as generative AI's impact on search access points. Google is in dispute with OpenAI over document production for the case. The legal battle continues as both parties remain at an impasse regarding evidence sharing.