Career
He was one of the founders of Kommune 1 in 1967. At the end of the 1960s he was one of the leaders of the Tupamaros West-Berlin, which carried out bombings and arsons. He was arrested in July 1970 and served five years in prison for those activities.
In 1997 he was sentenced to a year in prison for throwing an egg at the mayor of Berlin, Eberhard Diepgen.
He went into hiding for two years, reappearing to serve his sentence in 1999.