Denver Riggleman, a former U.S. House of Representatives member from Virginia, military intelligence officer and senior technical adviser to the House panel investigating the Capitol attack, said he knows who received the call, but not who placed it. He didn't name the rioter in an excerpt released by "60 Minutes," which will air Sunday.
"From my perspective, you know, being in counterterrorism, you know, if the White House, even if it's a short call, and it's a connected call, who is actually making that phone call?" Riggleman asked.
While working for the committee, Riggleman analyzed call records, texts and online activities of hundreds of people suspected of playing roles in the attack. He called the discovery of the call a "pretty big 'aha' moment."
He spoke with "60 Minutes" to promote the publication of his book "The Breach." The program released an excerpt Friday.
Riggleman's interview also appeared before the committee holds another hearing Wednesday at 1 p.m. ET.
This article originally appeared on USA TODAY: White House switchboard called rioter Jan. 6: former House staffer