How do police officers catch chases on tape for a show if they are working?

Question

They cant just tape it for fun if theyre working so how do they do it?

Answer 1

Every cruiser has a cam mounted on the dash and the trooper is mic'ed to record the entire conversation in case anything happens. It's to protect him and you.

As far as shows like Cops, they actually have a camera crew on patrol with them.