If you have proof as you state of the officers conduct you definitely need to discuss the issue with a lawyer, unfortunately there are expenses involved with this. However if you feel strongly you are innocent of wrongdoing that is the course you must take. If you simply file a complaint against the officer without any sort of substance behind the complaint you will definitely face further harassment not just from the single officer, but the whole department. Cops protect their own. You gotta do this right or you'll be worse off than what you already are