U.S. Attorney John Huber, center, speaks with reporters after leaving the federal courthouse Friday, July 29, 2016, in Salt Lake City, Utah.

Questions surround the work of U.S. Attorney John Huber, who is playing a key role in one of the multiple investigations surrounding President Trump and the Justice Department.

Known as a no-nonsense prosecutor whose primary experience is fighting violent crime, the U.S. attorney for Utah is an appointee of President Obama whose job was saved by Sen. Orrin Hatch (R-Utah) when Trump asked state attorneys to resign so that he could field a new slate of professionals.