Federal prosecutors argued that Charles McGonigal, the former special-agent-in-charge of the FBI’s Counterintelligence Division in New York, abused the public trust as they asked a federal judge to sentence him to five years in prison, the maximum penalty available under the law.

McGonigal pleaded guilty in August to one count of conspiracy to violate U.S. sanctions and launder money in connection with a scheme to assist sanctioned Russian billionaire Oleg Deripaska. He has also pleaded guilty in another case in federal court in Washington, D.C.