On June 18, 2019 Sonnenkrieg members Dunn-Koczorowski and Michal Szewczuk, 19, were jailed for terrorism offences. According to the prosecutor the men promoted "engaging in a "total attack" on the system", Dunn-Koczorowski having proclaimed "terror is the best political weapon for nothing drives people harder than a fear of sudden death" and were intent on action. Furthermore, the group was influenced by James Mason who "may well represent the most violent, revolutionary and potentially terroristic expression of right-wing extremism current today".