Did a little digging and this is all I could find
I would suggest you go to an attorney in the county that the incident occurred and discuss the case with them. They would probably be able to refer you to someone who specializes in that area.
Since I am assuming this was an issue with municipal or county LEO, you want someone fairly local. It could also save you in legal fees.
Which county did it occur in?
If I find something else I will post again.