I have to be the odd one out here...
I'm not convinced that the state did prove premeditation - except if, and only if, the gun used on TA was the same one taken from JA's grandparent's home.
Otherwise, they did prove that the trip was well planned. They did show convincing evidence that Jodi intended to visit Travis during the road trip.
I see a few very major gaps though in the premeditation theory:
1) The murder itself was very chaotic and violent, with way too much evidence left behind. Nothing planned about it.
2) If she came with a gun for the purpose of killing him, why the love-making, the shower pics, the posing, the usual (the same behaviour they always engaged in)? First?
3) If she came with a gun - why use a knife? There were defensive wounds, so he was fighting back. If the "shot at the end" scenario was true - why bother with the rest?
So far, for me, neither scenario (defense or prosecution) truly reflects the crime scene - and premeditation doesn't strike me as terribly plausible.
It is not just that the trip was well planned, it was that the trip was TOP SECRET. Why hide the fact that you are anywhere in Arizona if you are just planning to stop by and visit your ex? What is the big secret that needs to be kept?
She turned off her phone for 20 hrs, stopped using credit and atms, turned her tags upside down, didn't use any gas stations in Arizona, didn't park in TA's driveway, like she usually did.
All of that ^^^^ leads us to premeditation.
She planned out before hand, how to avoid being seen anywhere in Arizona, because she knew she was probably going to kill him.
1] Yes, chaotic, violent, because it did not go as smoothly as she hoped. The shot to the head did not take him down. So now she has a bloody, raging wounded man trying to escape. Imo, planning a murder is not as easy as it appears. I don't know how you can say there is nothing planned about it, when she did all of the pre-planninjg to avoid being seen in Arizona. As for the evidence left behind, a couple of reasons, imo. After a bloody life and death struggle, there has to be a lapse in judgment and common sense. You are not going to be thinking clearly. And she had a huge time crunch. A roomie could return at any moment. So she had to get out of there. She did the best she could, but hoped her preplanning her alibi would save her. JMO
2] Why didnt she just shoot and leave? I think for two main reasons. One, his roomie was there and she could not chance a gunshot until he left. And two, she still loved TA and hoped to change his mind still, imo. The seduction was to see if he would fall back into their relationship. I guess that didn't work.
3] There were 2 reasons for having both weapons, imo. I think the gun and knife were both used so LE would think there were two perps. It almost worked.
Also, the gun might have jammed so she needed to finish with the knife. I think her rage called for the stabbing. The gun was not as satisfying.
I think Juan will nail down the premeditation in his closing.
Besides that, look at a map. She was in the furthest tip of Northern California. And she says she planned on going to Utah. So why drive 12 hours south to Pasadena, in southern Cali, when it is hundreds of miles off course?