Career
Croissant was shown by Kurt Rebmann, then Attorney General of Germany “to have organized his cabinet the operational reserve of West German terrorism”. A campaign against his imprisonment, in which in particular Jean-Paul Sartre and Michel Foucault took part, was organized in his favour. He was released under bail and fled to France on 10 July 1977, before being stopped in Paris on 30 September.
There he applied without success for political asylum.
In spite of some protests in Germany, France and Italy, the court of criminal appeal of the Court of Appeal of Paris decides in favour of the extradition to West Germany on 16 November 1977. Croissant was extradited the following day.
In a platform published in Le Monde on 2 November 1977, Gilles Deleuze and Félix Guattari wrote:
He was sentenced and jailed for supporting a designated terrorist organization for two and a half years. After his release, Croissant started to work for the Stasi, which registered him 1981 as Inoffizieller Mitarbeiter "IM Taler“, Regular
Near XV/5231/81. In 1992 his collaboration with the Stasi was made public.