How can I file suit against another employee and state employer who has physically assaulted me then relocated me?

The 1st time she physically attacked me, I filed a report and nothing happened. The second time she did it, we went to our supervisor . Then the third time she did it, I have a witness. My employer was very rude to me. So they permanently moved me to another department. She is a rude lady and very vindictive. I can leave out supplies and folder for the clients for the next day and she will move them or hide them. It's been going on for months.