https://theintercept.com/2023/02/06/january-6-marines-nsa/
At the time of the insurrection, the three men were friends and were all assigned to the Marine Corps Information Operations Center at Quantico, Virginia, about 30 miles south of Washington. The center is involved in psychological warfare training and development for the Marines, among other functions.
"Interviews and court documents" is the only sauce. And confirmed by The Corps. I agree, we need actual sauce with this one. I suspect we will never get it given the nature of the situation.