John Earle Sullivan (born July 18, 1994), also known as Activist John, is an American political activist and self-identified photojournalist who participated in the 2021 United States Capitol attack. Before the January 6 attack, Sullivan organized and participated in protests relating to the Black Lives Matter (BLM) movement, though a few other BLM organizers explicitly disavowed him, even expelling Sullivan from rallies and warning fellow activists to avoid associating with Sullivan.On January 6, Sullivan entered the Capitol and broke a window. He repeatedly shouted encouragement to fellow rioters. Sullivan captured footage of the attack, his own interactions with law enforcement, and the shooting of Ashli Babbitt.After Sullivan participated in the Capitol attack, some theories accuse Sullivan of being affiliated with antifa, though federal authorities had not identified him as such and he has stated that he has no relationship to the antifa movement. By May 2021, Sullivan faced eight charges for his involvement in the January 6 events.