Updated: 6:26 p.m.

Former Senate aide Doug Hampton has been indicted on charges that he violated conflict of interest laws — over allegations that he contacted his former boss, Sen. John Ensign (R-Nev.), in violation of the chamber’s “revolving door” rules — the Justice Department announced Thursday.

A federal jury charged Hampton, who served as Ensign’s administrative assistant before leaving Capitol Hill in 2008, with seven counts of violating federal laws. He is scheduled to be arraigned March 31 in the U.S. District Court for the District of Columbia.

An attorney for Hampton declined to comment Thursday.

Ensign acknowledged in 2009 that he had an affair with Hampton’s spouse, Cynthia Hampton, who was a campaign aide.