The U.S. Department of Justice has concluded its antitrust lawsuit against Google, focusing on the tech giant's alleged monopoly in the search business. The DOJ has submitted a 509-page 'proposed finding of fact' and presented hundreds of slides during closing arguments, highlighting Google's significant payments to maintain default search engine status, which amounts to approximately $30 billion, or 40% of its revenue. Additionally, the DOJ requested sanctions against Google for purging documents. The case has drawn attention for its potential implications on Silicon Valley, with Google holding a 98% share of mobile search queries and the trial nearing its end. The government accuses Google of manipulating search ad prices and stifling competition across multiple platforms, including adtech and app stores.