Former Interior Secretary Ryan Zinke left office Wednesday following a Trump administration tenure characterized by aggressive environmental regulatory rollbacks as well as 18 federal investigations into his ethics, spending, and conduct while in office—but his resignation has not saved him from a Justice Department probe into potentially criminal violations. 

The Washington Post reported Thursday that the DOJ has opened a probe into whether Zinke lied to his own agency’s investigators about his involvement in a land deal in Montana and the blocking of a casino project proposed by First Nations tribes in Connecticut.

After questioning Zinke about the incidents, the Interior Department inspector general “came to believe Zinke had lied…[and] referred the matter to the Justice Department to consider whether any laws were violated,” according to the Post.