@Walter Hinteler,
I have been in Berlin, exactly in those days, on a school trip.
We went to the place of the murder the following day.
Most of us had never seen such a demonstration - both of police force as of numbers of demonstrators and the violence on both sides.
Though our teachers gave "different instructions", I took a couple of very interesting photos. (Black & white.)
Some were even published by newspapers.
I didn't get more than a few DM for them ... and a couple of years later, when the RAF terrorism was on the peak level ... well, somehow the film and photos "got lost".