If one enters an intersection during a green or yellow light, as in preparation for a left turn, one has not 'run a light'. One has acted in a completely legal manner.If the light is red and you’re in the intersection, you’ve run a red light. Yellow doesn’t mean race the red.
Once the light turns red,, one cannot stay in the intersection. That is illegal, blocking traffic. In that instance, one must complete the left turn.
That clears the intersection, and is completely legal.
So, your statement "if the light is red, and you're in the intersection, you've run a red light' not correct.
Entering an intersection on a yellow light is not illegal. Nor is it against traffic regulations.
Nevertheless, ease up on the traffic violations.
My point is, that a cop can make an accusation stick, with no evidence. Word against word. That's just immoral.
That sort of power corrupts. There are many, many examples of cops lying on the stand.
I know many on this forum were, or are, LEO of some sort. I would be willing to bet that most know, or know of, a cop that made a questionable bust, and lied to make it stick. I know several.
What I'm saying is that cops are not always right. There sure seems to be a cheering section that is willing to believe they are, in spite of evidence to the contrary.