“Wanna shoot an UNARMED VETERAN attempting to UPHOLD her Oath? The SAME oath you F—ING COWARDS seem to forget YOU took YOURSELF!” he wrote in a post on Parler, a social media site increasingly under scrutiny for an abundance of threatening messages. He challenged the Capitol Police to a “duel” and posted a video of the moment Ashli Babbitt was killed.

“WHAT ELSE DO YOU F—ING NEED!” he exhorted his followers on Parler. “WATCH!!! THEN CHOOSE! JOIN or DIE!”

A Washington Post analysis of individuals who breached the Capitol or were in the vicinity of the riots identified 21 people with some prior military service background. Of the 72 arrested or charged by state and federal authorities through Thursday morning, 11 have military backgrounds.