[skywal_l]

I've seen a movie where a cop gives a warning to one of the character and actually enters the warning into the system so that warnings are tracked. The guy is a bad dude that does not want to leave a trace so ends up killing the cop.

I don't know if it's an actual thing.

Edit: I remember now, it was Jack Reacher season 2.

[aceofspades19]

At least in Canada, you can get an official warning where they fill out the ticket slip but don't fine you. I'm not sure how long its tracked for but it is a real thing. Also I do believe that the car being pulled over is likely logged somewhere usually in the officer's notes.

[HideousKojima]

The reason he killed the cop wasn't that he didn't want to leave any trace (though he killed other people over that previously) it's that the car was stolen from someone he had murdered and he knew that that would show up when the cop ran the plates.