In the 1970s Klein worked for the legal Red Army Faction prisoner support group Red Aid ( '' Rote Hilfe '' ) in Frankfurt and subsequently for the RAF lawyer Klaus Croissant in Stuttgart . At one point he shared a Frankfurt commune with Joschka Fischer and Daniel Cohn-Bendit . He served as Jean-Paul Sartre 's chauffeur when Sartre visited the imprisoned Andreas Baader in December 1974 . He joined the RZ in 1975 . Klein has described Holger Meins ' death on hunger strike as inspiring his turn to violence ; he carried a photo of Meins ' emaciated body in his wallet . He took part in the 1975 attack organized by Carlos the Jackal on an OPEC conference in Vienna , in which three people were killed and Klein himself shot in the stomach
1975 attack
OPEC siege
Hans-Joachim Klein