Judge will decide whether the internet giant, already facing the prospect of a breakup over its monopolistic search engine, also runs its advertising unit as an illegal monopoly.

The U.S. Justice Department told a federal judge Alphabet's Google illegally dominated online advertising technology in seeking a second antitrust win against the company.The closing arguments in Alexandria,

The Department of Justice (DOJ) and Google wrapped up the tech giant’s second antitrust trial in two years Monday, as the company seeks to fend off monopoly allegations in the advertising technology space.

Closing arguments cap 15-day trial in which prosecutors sought to show Google monopolized markets for publisher ad servers and advertiser ad networks and tried to dominate the market for ad exchanges

The penalties could be severe. Last week, the Justice Department asked the judge in that case to break Google up by forcing it to sell Chrome, the most popular web browser in the world. Google has until Dec.

The trial in a Virginia federal court is Google’s second ongoing US antitrust case as the US government tries to rein in the power of big tech. In a separate trial, a Washington judge ruled that Google’s search business is an illegal monopoly,

The U.S. Department of Justice and Google both delivered closing arguments in the U.S. antitrust trial concerning Google's ad business.