A businessman who allegedly bribed Texas Attorney General Ken Paxton to drop a fraud investigation has been arrested by the FBI.

Nate Paul, a real estate developer and Paxton’s friend, was taken into custody on Thursday on charges of wire fraud, money laundering and making false statements to federal agents.

Paul is accused of paying Paxton $100,000 in exchange for his intervention in a legal dispute involving Paul’s company.

Paxton, who is facing a separate criminal indictment for securities fraud, is also under investigation by the FBI for his role in the scheme.

The scandal has sparked calls for Paxton’s impeachment by lawmakers from both parties.