False arrest on 3-22 need video/witnesses

On the 22 of March I was chased, beaten down, stepped on, arrested and booked by the SFPD for what I thought was a public urination charge. What I did not know at the time is that they either congered up or mistook me for someone who threw a bottle and eventually charged me with a felony (attempted assault with a deadly weapon).
Myself and the people I was with were about ready to leave when I made the huge mistake of relieving myself at the entrance of the Fifth and Market Muni station. I turned around to see about 15 riot police rushing down the steps after me. Like any good natured creature on this planet who is being threatened with violence I fled (which was also a big mistake) They eventually caught me and proceeded with the beating. While this was happening a bottle was thrown and smashed on the police helmets and my head. Now I don't know if this is the bottle they are accusing me of throwing but I did not see any bottles thrown before this one.
Although I have no affiliation whatsoever with the anarchists or the blackblockers I was wearing all black just by coincidence. I believe this may have been the reason the police targeted me seeing as there were many others in my area commiting the same crime (pissing in the muni station).
I'm looking for anyone who my have any information that could possible help my case. My court date is on Thursday the 27so please, please, please contact me. Thank you. Peace.
Andy Kulikowski