Wow, that is a heck of a story. Are you in the USA? In the US you have recourse. I think you need to find a lawyer and maybe do an out of state thing (I know it can happen if you and lawyer feel you will not get a fair hearing). If you are not in the US then you have to check your local laws and lawyers.

I do say though that we only have one side of the story. I usually believe half of what I hear, it has worked out for me quite well. I know the police have and can be brutal (I have taken a night stick to the back of the legs a few times when I was younger). There is a lot of details you are leaving out whether on purpose or what ever reason.

Did the police get called about you and why? Did they just pull up on the street and start beating you? Were you drunk in a bar or elsewhere and causing problems?