My question involves criminal law for the state of: SC.
I am underage and i was drinking one night with some friends and let my sober friend drive me to my sisters work to get some food and sober up. While waiting in the parking lot, one of my drunk friends decided to get out of my truck and urinate in the parking lot. Apparently, a women saw him and called the cops. I was then walking around the parking lot on the phone, and began getting questioned by a cop. After talking with all the witnesses, the oficer forcefully put handcuffs on me and told me i was under arrest. I was trying to turn around and ask him why multiple times until he literally picked me up,since im about 125lbs. and he was no less then 250lbs., and slammed me on the trunk of his car on my head so hard I briefly lost conciousness. After waiting in the back of his patrole car for an hour, he released me to my parents and gave me a Disorderly Conduct and MIP of beer ticket. I was never read my rights, and when he TOLD me i was drunk, i demmanded a breathilizer or blood test, which was denied. The next day I got a CT scan verifying a concussion. What should i do?