Contee has already spoken to lawmakers in a closed-door hearing, but the testimonies of Irving, Stenger and Sund can be monumental. All three played key roles in deciding how to prepare for the January 6 rally, and yet the Americans hardly heard of any of them.
Sund spoke sporadically. His highest statement so far came in a letter he sent to Congress leadership detailing the decision-making process leading up to January 6 and his response when the rally turned violent.
Neither Irving nor Stenger spoke publicly about the insurrection.
In his letter, Sund transferred significant blame to some of those he will testify on Tuesday.
“It seems that the entire intelligence community has not realized this,” he wrote.
According to Sund’s letter, he asked Irving and Stenger, who together with the Capitol Architect form the council that oversees the police department, to request the National Guard before the event.
Irving said he “was concerned with ‘optics’ and did not feel that intelligence supported it,” wrote Sund. Senate Sergeant Stenger suggested asking the Guard to be ready if Sund needed them.
A Congressional source said Contee, Irving and Stenger are likely to appear virtually. Sund is expected to testify in person.
His new testimony takes place at the moment when authorities are beginning to search for a new USCP chief.
A Congressional source told CNN that Congress is moving ahead with hiring an outside entity to start the search.
Several other committees working together have already received briefings and documents from intelligence agencies as part of the numerous investigations.
The joint review by the House’s Intelligence, Homeland Security, Supervisory and Judiciary committees led to an initial production of FBI, DHS and NCTC documents last week, a Congressional source told CNN. In addition, they received several reports from the three agencies.
The source said that so far the documents are mostly finished intelligence products that the committee can now access.