I think it was a somewhat capable amateur that had a decent plan, but when he saw the story go national, he freaked out, killed the old lady, and did his best to disappear because there was no way he was going to actually collect money and get away after the whole country was aware. And they’ll probably find him if that is really his DNA on the glove since half the country idiotically submitted their DNA into databases like Ancestry.com. Sure, maybe this guy didn’t. But if his uncle did, the FBI will figure out it was someone closely related and narrow it down until they get him. Personally I think using DNA from genealogy sites should be illegal for the government, but I’m sure I’d change my tune if my kids got stolen or something.