Erik Jansen had been a Marine. He was discharged and became a Neo-Nazi. He met Anthony Conlan on an online discussion form as a Theistic Satanist. He became a member of his cult, a true believer.
He pretends to be a cop under Belacourt's authority to follow Marcus.
He is commanded by the Prophet to kill Belacourt, and shoots him with a high-powered rifle in a mall parking lot.
He is shot and killed by Marcus Williams during their fight on top of an elevator taking them to the Sky Chapel.