You need to file a grievance with that police officer's division. IA will review his/her body camera which is the starting point. But it all depends on which police department has issued you the citation and what the citation is for. You need to be more specific. Issuing you the citation for a traffic violation and playing the race cards are two separate issues. Even if police officer is found guilty of such behavior, you will still need to pay for the citation unless you fight the ticket.
교통위반 티켓과 인종차별은 둘다른 이슈입니다. 아무리 인종차별건이 증명됬더라도 교통위반이 증명되는 순간 티켓은 따로 처리해야 합니다. 인종차별 안건은 따로 grievance 를 접수하셔야 합니다. 세월아 내월아 기다려서 언제 끝날지 모르는 안건이죠. 티켓받으면 다들 인종차별로 생각을 하긴 하죠. 잘 생각해보세요.