Can police turn on/off their patrol car computers and dashboard cameras whenever they want?Are they always on?

depends on the department. most of them restrict the ability to turn the equipment off.

We have our cameras set up to turn on when the blue lights are activated or they are turned on manually. They are always recording so if the officer stops you for running a stop sign and activates the recorded it will back up 2 minutes.

Yes, they can be turned on or off. However, that usually goes against standard procedure. But yes, if you've ever been in a patrol car, you can SEE the "on/off" switch.

I guess it depends on what state but in my state...in the night time when they are parked and trying to get the speed demons....they're light has to be turned on for the safety reasons

If you're wondering if you got caught doing something... yeah... ya did

Yes, they can, when they are on secret mission.