Reports have begun circulating that Joel Greenberg, an associate of embattled Florida Congressman Matt Gaetz, is expected to plead guilty to criminal charges during a hearing on Monday.

Fox News reports:

Joel Greenberg will appear Monday in federal court in Orlando, Florida, for a change of plea hearing, according to court documents. He had been working for weeks toward a deal with federal prosecutors who are investigating sex trafficking and public corruption allegations.

The plea potentially escalates the legal and political jeopardy the Florida congressman is facing and signals that Greenberg could potentially serve as a witness in the Justice Department’s investigation into Gaetz.

Investigators have also been looking at whether Gaetz and his associates tried to secure government jobs for some of the women, the people said. They are also scrutinizing Gaetz’s connections to the medical marijuana sector, including whether his associates sought to influence legislation Gaetz sponsored.

Greenberg was charged in August with sex trafficking a girl between ages 14 and 17 and using a state database to look up information about the girl and other people with whom he was engaged in “sugar daddy” relationships, according to the indictment.

The Department of Justice began investigating Rep. Gaetz during the Trump administration for sexual misconduct with a minor and sex trafficking. The Florida Republican has vehemently denied the accusations and insisted he will not resign from Congress.