Two members of the House of Representatives asked a federal judge in New York on Thursday to appoint a so-called special master to ensure that all materials related to notorious sex offender Jeffrey Epstein are released by the Department of Justice as required by the law they promoted.

Reps. Thomas Massie, R-Ky., and Ro Khanna, D-Calif., in their request for that independent monitor, blasted the DOJ for failing to meet a Dec. 19 deadline to release all of the Epstein files.

“The conduct by the DOJ is not only a flagrant violation of the mandatory disclosure obligations under the Epstein Files Transparency Act, but as this Court has recognized in its previous rulings, the behavior by the DOJ has caused serious trauma to survivors,” Massie and Khanna wrote to Manhattan Federal Court Judge Paul Engelmayer in a letter obtained by CNBC. The letter was first reported by MS Now.

“As leads of the Epstein Files Transparency Act, we have urgent and grave concerns about DOJ’s failure to comply with the Act, as well as the Department’s violations of this Court’s order,” the letter said.

The DOJ, in a court filing earlier this week, said that it still needs to review more than 2 million documents related to Epstein.