The dash camera in the car is getting to be a necessity. As per the tv commercial, the dash camera can save you from being accused falsely particularly by extorting cops (which are common in our country). At least you have proof that you didn’t run through a red light or in cases of accidents, there is evidence of what really happened. And the dash camera is easy to install, easy to operate, and easy to archive. Do you have a dash camera in your car? I still have to buy mine... waiting until the price goes down.
In regards to cops, that's not so much an issue here, as they all have cameras mounted to their uniforms. It's the responsibility of the officer to make sure it's always recording when interacting with others, so it's prevented from doing so, that automatically puts the officer in trouble. Hard to game that system.