On the second of April 2005, over 3,000 German anti-nazi's gathered in the streets of Dortmund to memorate the punk Schmuddel. Schmuddel was killed by a neo-nazi on March the 28th, 2005.
On the photo you see clearly the crowd moving through the streets and the German police watching over them. No incidents happened this day.
See the 'link' for photo's of this demonstration.