They are not "undercover" officers per se--officers who have a secret identity for deep cover work. They are working a regular police shift, carrying a badge and gun, but doing so in plainclothes.

Ever wondered what crimes an undercover police officer is allowed to commit for the sake of the investigation? It turns out ...

One commenter wrote, “A lot of undercover cop cars have the license plate starting with ‘P’ and most have 2-3 extra antennas on the back, or the roof, little badge that says like interceptor ...