[1] Shortly after, he founded the Fraternal Order of the Alt-Knights (FOAK), a paramilitary group that is considered a partner or subgroup of the far-right, neo-fascist Proud Boys organization.
[1][6][3][7] He led the FOAK until later that year, when he faded from his leadership position following an assault conviction related to the March 4 Trump rally.
[3] Chapman became active in counter-protests after he saw a video of a Trump supporter who was pepper-sprayed when attending a Milo Yiannopoulos speaking engagement at the University of California, Berkeley.
[1][6][10] The group was initially organized to provide protection to attendees of conservative speakers including Ann Coulter and Milo Yiannopoulos.
[1] Following Chapman's criminal convictions, he faded from the spotlight as a leader among the Proud Boys, but for a while remained an active supporter in online postings.
[8] While gathering near the White House to watch Donald Trump's post-election night speech in the early hours of November 4, 2020, multiple Proud Boys including Tarrio were stabbed during an altercation.
[4] Chapman also directed racial slurs at Tarrio, who is black and Latino, and suggested he had been appointed the chairman of the group because of tokenism.
[4][6][8] Chapman made what The Daily Dot has described as a "thinly-veiled vow to violently overthrow the government and replace it with a white supremacist fascist regime", referencing the neo-fascist Third Position ideologies.
[2] In August 2017, Chapman pleaded no contest to the charge of felony possession of a leaded cane or billy club, and was sentenced to five years of probation.
Chapman pled guilty to aggravated assault, and was sentenced to three years of deferred adjudication, a $10,000 fine, and anger management classes.
While she was changing Chapman's mask, he called her a derogatory name and forcefully grabbed her arm in front of another healthcare worker and two security officers.
In court filings, his lawyer stated that Chapman was in "great medical distress" that had caused him to have a priest administer the last rites.
Chapman stated he was having increased difficulty breathing and told police he felt he "was being harassed by medical staff members and was not receiving adequate care.