seemed to be the victim of circumstances.
of her own creation - she hired the men, No one forced her to.
Her mental abilities were extremely restricted
No, she had an IQ above retarded (as that is the standard). She was not restricted in her mental capacity, just not as smart as others (for those wondering, the IQ to be deemed retarded is 70, hers was 72).
Yet the Court found her guilty, awarded her the capital punishment
Wrong again. As dictated by law and SCOTUS rulings, the JURY found her guilty and sentenced (not awarded) her to death.
Tresa Lewis was married to Julian for the second time
Wrong - for the first time. it was her second marriage.
Apparently at the instigation of Mathew Shallenberger and his accomplice Rodney Fuller,
Wrong - she planned the hit, and hired them. That much is part of the court testimony and is not in dispute.
I wonder on what grounds the death penalty was imposed.
Pre-meditated murder. You cannot get the death penalty for involuntary or unplanned murder (if no other crime like Robbery is involved).
There is no doubt that she facilitated the crime but she did not actually carry out the killing and therefore under the law she cannot be guilty of a capital offence.
Wrong - just because you hire someone else to do the job, you can (and she was) still be guilty of capital murder. The argument is sound in ALL countries of the world. just because you use another human instead of a gum. knife, brick or bolder to kill someone does not change the intent or the results. And in the murder arena, only Capital murder is punishable by death, and her case - which is SOP - was appealed all the way to SCOTUS.