Matthew Warren Heimbach (born April 8, 1991) is an American former neo-Nazi, white supremacist and anti-semitic conspiracy theorist.[1] In September 2018, Heimbach took the position of community outreach director for the National Socialist Movement (NSM).[2] He founded the Traditionalist Workers Party (TWP), which ceased operation in March 2018 when he was arrested for assaulting Matt Parrott, a co-founder and his father-in-law,[2][3] in the course of Heimbach's pursuit of a sexual affair with his mother-in-law (Parrott's wife).[4]