The situation escalates during the later part of the evening, when the Shahs stay in Berlin. Police agents, even the head of operations Helmut starke (ri.) remove protesters in Berlin-Charlottenburg. On June 2, 1967 Pahlavi was received in West Berlin, accompanied by violent clashes of protesters with Iranian secret police collaborators and massive police forces, whereby the student Benno Ohnesorg was shot by police officer Karl-Heinz Kurras, an incident that became a turning point in the devolution of the German student movement. On 26 September Mayor Albertz was forced to resign after an investigation into the police's role in the killing.