Former CIA Director John Brennan, who has been under investigation by the Justice Department, is demanding the Trump administration preserve records about its inquiry into him, and asking for a court’s help, according to a new lawsuit filed in Washington, DC, on Wednesday.

Brennan alleges that the Trump administration is vindictively trying to prosecute him, and that he is concerned internal Justice Department records and communications may not be kept in a way that would allow him to challenge a case in the future for improper prosecution decisions, according to the filing.

“Administration officials from the Acting Attorney General to the FBI Director and the Counselor overseeing the Brennan investigations have been publicly declaring Director Brennan a criminal, not only before securing a conviction in court but even before a full investigation and an indictment,” Brennan’s lawyers wrote on Wednesday. “And, certain officials in the Department of Justice are engaging in demonstrably irregular prosecutorial activity in order to gin up a case that will satisfy the President’s direction.”

“Officials of this Administration have shown an advertent disdain for their preservation obligations,” they also wrote.