. DoubleClick has become a key part of Google's advertising business, which has raised antitrust concerns.
Shores previously worked as in the litigation and antitrust department at law firm Shearman & Sterling. He was hired in October by Deputy Attorney General, Jeffrey Rosen, to work in his office, which oversees all of the Justice department divisions, rather than Delrahim's antitrust division. The Justice Department said at the time he would work closely with its antitrust review, so he has been overseeing the investigation since then.
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