That same product design exists today, Schmidtlein said.

The guidepost should be, Do I see Google taking action to address competitive verticals?

The trial at the federal courthouse in Washington, D.C. is expected to last ten weeks.

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Jonathan Kanter, Assistant Attorney General for the Antitrust Division, arrives at federal court in Washington, D.C. on Tuesday.Photo by Kevin Dietsch/Getty Images

U.S. attorneys also will cite Googles bundling of its search engine with Android software.

Without competition, Google refuses to provide credible protection for user data, Dintzer said.

Dintzer and William Cavanaugh, lead attorney for the states, accused Google of withholding key evidence.

WGA West building in Hollywood

They destroyed documents for years because they knew their conduct violated antitrust laws, Dintzer said.

They had incentive to go somewhere else, but their was nowhere else to go, he said.