Four members of Donald Trump’s inner circle are planning to defy subpoenas for documents and testimony issued by the House committee probing the efforts to overthrow the 2020 presidential election that culminated in the January 6th attack on the U.S. Capitol, according to The Guardian.

The outlet adds that Trump has insisted on the non-compliance, which may result in criminal prosecution.

Trump’s former chief of staff Mark Meadows, former advisor Steve Bannon, former deputy chief of staff Dan Scavino, and former defense department aide Kash Patel have until Thursday to hand over documents requested by the committee.

“For those who don’t agree to come in voluntarily, we’ll do criminal referrals,” Rep. Bennie Thompson (D-MS) told reporters last week.

Illinois Rep. Adam Kinzinger, one of the two Republicans working on the congressional investigation, told CNN the committee is “going to do everything in our power to get them to testify.”

“The problem is when you start seeing people resist, and people obfuscate, you have to look at that and go why are they doing that if they have nothing to hide?” Kinzinger added.

According to CNN, the committee has been unable to locate Scavino in order to serve him a subpoena. “One source familiar with the situation joked that the committee should just tweet the subpoena to the former Trump aide since he’s been actively trolling the panel there in recent days,” CNN reports.

Trump is facing a different deadline to hand over documents, although the exact date is unknown. He will likely try to invoke executive privilege, but the current White House – not out-of-office administrations – make decisions on that front, and President Joe Biden has indicated he will support the committee’s investigation in whatever way possible.

Still, by resisting the subpoenas and refusing to testify, Trump and his associates can setoff a protracted legal battle that can delay the investigation and dismantle efforts to release a final report in time for the 2022 midterms.

POLITICO adds more details on the specifics of the investigation:

More of the contours of the committee’s investigation became clear Friday when Thompson noted that the panel has divided its work into “five teams.” A source familiar with the breakdown said those teams are pursuing distinct aspects of the Jan. 6 narrative. They include the campaign by Trump and his allies to pressure Pence to overturn Biden’s Electoral College victory and the mobilization of extremist groups like the Oath Keepers and Proud Boys to descend on Washington for the Jan. 6 event.

Other details have dripped out as inquiries made by committee investigators have trickled into public. For example, investigators have begun seeking testimony from the Jan. 6 rioters themselves, particularly those who have pleaded guilty and are preparing for sentencing. The panel is relying on investigators who in some cases are recent departures from the Justice Department and are now acting as committee counsel.