Oyer has since told various media outlets that her firing came shortly after she declined to recommend restoring gun rights to actor Mel Gibson, a supporter of President Donald Trump. She is one of several Justice Department officials slated to testify on Monday afternoon before a hearing organized by Democrats in the House of Representatives and Senate about the Trump administration’s treatment of the Justice Department and law firms who act in cases disliked by the Republican president.

Democratic U.S. Senator Adam Schiff of California called the mobilization of the Marshals to deliver a letter an effort to “intimidate and silence” Oyer, while U.S. Representative Jamie Raskin of Maryland compared it to a move “ripped straight from the gangster playbook.”