Members of the Secret Service patrol from the roof of the White House as President Donald Trump speaks to supporters from The Ellipse on January 6, 2021.
Washington CNN  — 

The House Select Committee investigating the January 6, 2021, attack on the US Capitol is wrapping up its review of more than a million pages of Secret Service documents and plans to bring in top agents and officials from the agency to testify in the coming weeks, multiple sources tell CNN.

The widening list, which sources say includes about a half dozen witnesses, indicates the committee is still pursuing answers from the agency on a number of fronts, including what it knew about threats ahead of the attack, what former President Donald Trump knew about armed protestors heading to the Capitol, and how it responded to testimony about Trump’s altercation with his security detail that day.

In its last hearing the Committee presented some new internal Secret Service communications, which indicated agents were aware of potential violence on Jan. 6, including threats against then Vice President Mike Pence. The trove of Secret Service documents was subpoenaed by the committee after it became public the agency had deleted text messages from the day of the attack.

The committee has previously said it intends to call back two key witnesses, former Secret Service Assistant Director Tony Ornato, who left the agency to briefly serve as Trump’s deputy chief of staff, and Trump’s lead Secret Service agent on the day of the attack, Robert Engel. Both men have already met with the committee.

Among the other witnesses under consideration, sources say, are:

  • Kimberly Cheatle, the current Secret Service director who served as Assistant Director of Protective Operations on January 6, making her the top agent in charge of protecting key government officials that day.
  • Anthony Guglielmi, current chief of communications. Appointed in March 2022, Guglielmi was not with the agency at the time of the Capitol attack, but has handled the agency’s response to key developments in the committee’s investigation including how the Secret Service has responded to testimony from former Trump White House aide Cassidy Hutchinson about a heated altercation between Trump and his agents in his presidential SUV on January 6.