I am truly surprised that he was still in this country. There was no shortage of money, and he has been seen abroad numerous times - I would not have stayed here.
I also would not be surprised if, after locating Bin Laden, the FBI turned its sites on him as the #2 man, and devoted more resources to catching him.
It's also possible that he gave up the fight because of his age, and he's tired of running.
And for the person that said they're catching "an old man" - this dude is a stone cold killer, and he's more dangerous at 81 than you've ever been in your entire life.