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 ...

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 ...