OPEC siege On 21 December 1975 she participated with the international terrorist " Carlos the Jackal " in a raid on the OPEC headquarters in Vienna . There she murdered two people : one was a policeman named Anton Tichler and the other was a plainclothes Iraqi security guard who had managed to grab hold of Kröcher-Tiedemann . While he was attempting to control her weapon , Kröcher-Tiedemann produced a second gun and shot the man through the head
raid on the OPEC headquarters
OPEC siege
Gabriele Kröcher-Tiedemann