Joel Greenberg to cooperate with investigators, plead guilty to 6 federal charges in court Monday

ORLANDO, Fla. — Former Seminole County Tax Collector Joel Greenberg is expected to plead guilty in federal court Monday to six charges, including child sex trafficking.

Greenberg’s testimony, as part of that cooperation agreement, could lead to others facing charges in Greenberg’s circle of friends.

After nearly a year of federal charges piling up for Greenberg, he is set to be in court as part of a cooperation plea agreement.

Watch: Federal investigation into Greenberg possibly tied to Gatez probe

In exchange, Greenberg will become a witness for the government in future prosecutions.

The most severe charge Greenberg will face is the child sex trafficking.

According to the 86-page plea deal, Greenberg will admit to having sex with a minor victim and paying her for sex.

In addition, prosecutors said Greenberg supplied drugs to the victim, took drugs like ecstasy himself and introduced her to other men who also had sex with her.

Watch: New documents detail deputy run-ins with former Seminole County Tax Collector Joel Greenberg

Federal prosecutors said Greenberg also used online and mobile accounts to make more than 150 payments to girls and the victim for sex, spending more than $70,000.

While not named, sources have told ABC News that Greenberg is expected to cooperate in the federal sex trafficking investigation into Florida Rep. Matt Gaetz. Gaetz has not been charged and denies all allegations.

Watch: Texts, voicemail link Rep. Matt Gaetz, former Seminole County tax collector Joel Greenberg

Prosecutors said Greenberg set up bank accounts across the area to hide his financial dealings at the tax collector’s office.

At one point, he got $200,000 from a family member to try and cover his tracks and instead purchased cryptocurrency for himself.

Channel 9 will be in the courtroom Monday morning for continuing coverage of Greenberg’s hearing.

Cox Media Group