Don't take that personally, but the issues you present have been litigated, and decided.I don't take it personally, you have not made it so, to your credit. Well, if issues have been litigated and decided why do we wait lifetimes to execute convicted killers? Juries can and do make errors. I believe the one in this case was wrong. Terribly so.
You pose an interesting question: did the jury, in fact, make an error? I have seen nothing that suggests it is so (although that is not evidence). I've seen members of the jury express dismay at the sentence, but that sort of thing is not permitted to affect their deliberations for that reason.
It's a tough question, and you can see the 5th Circuit struggle with it . . . the principle is that jury verdicts stand.