© Joel Goodman - 07973 332324 - all rights reserved . 21/08/2012 . London , UK . Video has emerged of a man being detained in Brixton on Sunday ( 19th August ) during which it is alleged police officers stamped on the man's head . Protesters march from Lambeth Town Hall to Brixton police station and deliver a formal complaint about the incident to the front counter . Photo credit : Joel Goodman