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Joel Greenberg, the former tax collector for Seminole County, Florida, has been providing information about the conduct of Rep. Matt Gaetz (R-Fla.) to federal investigators since last year, two people with knowledge of the matter told The New York Times on Tuesday.

In late March, the Times reported that Gaetz, 38, was the subject of a Justice Department investigation into whether he had sex with a 17-year-old girl and paid for her to travel out of state with him. The Times says the inquiry stemmed from an investigation into Greenberg, who has been charged with sex trafficking of a minor, stalking, and bribery.

People familiar with the matter told the Times that once Greenberg realized how much evidence the government had on him, he determined that in order to get leniency, he would need to start cooperating. He reportedly told investigators that he and Gaetz gave cash and gifts to women in exchange for sex.

During a hearing last week, Greenberg's lawyer and a federal prosecutor told the judge it's likely Greenberg will plead guilty sometime in the next few weeks. Following the hearing, Greenberg's attorney, Fritz Scheller, said, "I'm sure Matt Gaetz is not feeling very comfortable today." Gaetz spokesman Harlan Hill told the Times that Gaetz "has never paid for sex" and proposed that Greenberg is "trying to ensnare innocent people in his troubles."