Maybe the jury would have sentenced you to death anyway. Despite your relative lack of criminal history. You shot a store clerk, after all.
But here's the thing I think that solidified the needle: When, after shooting the clerk once, you approached him as he was prostrate the ground and said: "“I told you I was going to kill you.” And then kicked him and shot him a second time. In the back. With a shotgun. With a smile on your face.
Conviction and death sentence unanimously affirmed.