Kevin Ring, a former colleague of ex-lobbyist Jack Abramoff, will face a third trial related to a public corruption scandal, this time on charges that he lied to investigators hired by his former lobbying firm.

U.S. District Judge Ellen Huvelle scheduled a May 24 trial on the two charges, the Associated Press reported Tuesday.

Ring, a former House aide who then became a lobbyist, was convicted on five public corruption counts in a retrial last year following a mistrial in 2009. He has not yet been sentenced.

He was indicted in 2008 on charges stemming from the investigation centered on Abramoff, his former boss. Ring was the only lobbyist who opted to challenge the government in court rather than accept a plea deal in the Abramoff investigation.

Ring declined to comment to Roll Call on Tuesday.