No, you should see people in civilian clothes, are you in Kavala? Also police wear black uniforms with a black vest that says Police on the back, you should be able to recognize them from afar (some where a blue uniform which are trainees). Medics wear green overalls. Everyone should roleplay...
While I understand that ARAC/Civs having them causing more issues then solutions for creating a better RP experience, the Police should have them. When conducting investigations, it becomes pretty hard to role-play when you have a dozen hobos running around the "crime scene" or trying to chat...