In May 1973, Maroon joined photographers, television cameramen, and journalists covering the Senate Select Committee on Presidential Campaign Activities, more popularly known as the Watergate Committee. But his familiarity with the Nixon White House staff led to unusual behind-the-scenes opportunities. He could photograph in places that no other press reporters had permission to enter.

Maroon now recorded the familiar faces of Nixon's White House staff in a very different atmosphere. Witness testimony proved damaging for the White House, CRP, and the president himself, documenting abuse of power, obstruction of justice, and wiretapping targeting Nixon's critics and opponents. Maroon resolved to continue photographing the unfolding events of the Nixon presidency to complete his story of the administration. The resulting photographs include surprisingly intimate images of key figures in the public spotlight.
 

Of everyone he photographed in the Nixon White House, John Mitchell proved most supportive of Maroon's work. Maroon had photographed Mitchell in his apartment at the Watergate complex in 1971, and Mitchell later allowed Maroon to photograph quiet moments during recesses from testimony at the Watergate hearings, July 11, 1973.

Maroon continued to photograph the participants after the Watergate investigation moved to the Judiciary Committee of the House of Representatives in October 1973. Members of Congress considered the prosecutors' charges and evidence of the president's misconduct in office. The Watergate crisis reached its peak as the Committee voted on July 27, 1974, to recommend three articles of impeachment: obstruction of justice, abuse of power, and contempt of Congress.

By early August 1974, it was evident that President Nixon did not have the support of Congress to continue in office. A delegation of senior Republicans went to the White House to inform the president that he would not survive a vote on impeachment in the House of Representatives, or a subsequent trial in the Senate.