Seems to me the officer must have been traveling in the opposite direction, and was, I don't know maybe watching the light from his mirror maybe?
He states in the discovery that he had to turn around in order to pursue your vehicle.
So I would be questioning his direction of travel.
As well I would want to know, How he managed to see the changing of the light and your vehicles position within, ahead, or beyond the intersection? All while driving his own vehicle in a safe manner doing what sounds like an average speed of 40-45 mph.

If it turns out he was ahead of you and witnessed this incident, than again he would have had to do all while watching you in his mirror, And I question how he was able to be sure of the light and your vehicles position in the road.

He says he had to turn his cruiser around to give chase and this would mean at your supposed "High Rate of Speed" he would have had some considerable distance to cover to do any catching up required. And I'd question his ability to identify you personally out of the other cars on the road. He would have had to have lost sight with your vehicle at some point and that right there opens up a small window of doubt.

And as I'm sure you already know the court is set up to find you guilty beyond a shadow of any doubt. Well he can't deny that it is very possible that the chances of another car similar to yours could easily have just turned onto the road (Like you) While the actual target he was forced to take his eyes off of for even a second was flying by so fast he whipped right by you and was gone leaving you to take the fall for his evasive driving behavior.
Not saying it is likely by any means I am saying it is possible. So you'd need to prove he lost eye contact with the suspects vehicle, and then mistook your similar looking vehicle for his suspect.

I mean how could it have possibly been you? You have a blemish free driving record, You always make it a point to obey all laws on the road, you respect law enforcement and the court system and you have worked diligently to maintain your impeccable driving record. You are also the type to own your mistakes and had this have been your vehicle and your doing you would gladly throw yourself at the mercy of the court. But just can't stand by idle while this great deal of injustice is bestowed upon you. Lol

In all seriousness I'd demand politely that all charges be dropped, as NOT committed.

Not sure about the stop sign thing though, Good luck with that.

I guess I was a little late here, Well congrats for the victory. Sounds like you had a real cool judge. They're not the norm so be happy for that.