The U.S. Department of Justice (DOJ) is concluding its antitrust case against Google, accusing the tech giant of monopolizing the online advertising market. Key testimonies from Google executives suggest internal communications may have been deliberately obscured to shield sensitive information, prompting concerns over potential evidence tampering. The trial, which has presented over 1,800 exhibits and 25 witnesses, focuses on Google's dominance through its ad server and exchange systems, with implications that could threaten its $307 billion ad empire. YouTube CEO Neal Mohan defended Google's acquisitions and innovations, stating the company aims to help publishers rather than monopolize ad tools, but prosecutors allege anti-competitive practices. The case's outcome could depend heavily on the court's interpretation of Google's internal communications and the implications of its market practices.