Robby,
You said that the summons was issued as a result of your left turn. You'll have to prove that you were inside in intersection (beyond the first line of a marked crosswalk)before the light turned red. It is OK to make a left turn on a red light provided that you were within the boundries of the intersection while the light was still green.
For arguments sake, lets say you entered the intersection on the green light, paused, maybe to allow some oncoming traffic to pass you, or were behind other cars turning left, then you proceeded to safely make your left turn. Traffic conditions are an important consideration here.
As Rayder stated, and you'll know within the first ten seconds of the officers testimony, if he is prepared or not. You'll have to adjust your strategy on that. Good thing for you, the officer goes first. Basically, testifying in traffic court is following a script for the officer. He needs to make "salient" points. Going pretty much as follows. The officer will identify himself and tell where and when the violation occured. If he was in a marked car. He will describe the intersection, crosswalks? type of light, red amber green? and the times in seconds that each phase of the light. He should say that he returned to the scene and looked at the light from your vantage point and observed it to be in proper working order. He should tell where he was in relation to your vehicle, behind etc and that he observed you vehicle cross a point that he considers the intersection while the light was RED. This point is usually a marked crosswalk or an imaginary line based upon a building line or some stationary object. Something like this, "I observed a yellow Edsel cross into the intersection after the light was steady red for approximately 2 seconds, I had a clear and unobstructed view of the subject vehicle. I followed the vehicle for one block and pulled it to the side of the road at the corner of x and y street. I informed the motorist of the violation observed and requested his identification, which he presented. A Georgia photo drivers license. He was identified as Robby Macanudo etc etc." He matched the photo on the license. Any statements made by the driver can be used in court. "I had to go pee pee"
You should return to the location and become very familiar with it. Check the timing of the traffic light on all sides if possible and make a note of it. Note if there is a marked crosswalk also. You need to be within the intersection before the light was red. Where was the officer in relation to you? Was his car in motion? What if he was on the side street? If so, could he know what color your light was? Using identification as a defense sometimes works but now with photo ID's its less likely. If you gave him some ID without a photo (Unlikely nowadays) you should ask for as many postponements as possible to allow the incident to be forgotten over time. Forget it if the car is registered to you, you'll look like an ass if you say someone other than you was driving your car with your license who looks like you.
Now that I've beaten this dead pony enough, good luck. Im sure Ive left some things out, its been a few years since I taught this course. Questions?username above @yahoo.com