I think the Patriots will let him walk because he is, in Bill Belichik's mind, replaceable. Is he wrong? He may be, he may not be. But i think Belichik is going to find out. The only difference between Samuel and Law is that Law actually stayed with the team for a longer period of time.
I think also that he will leave the Patriots organization, have one year of success, and you will only hear about him because of the big contract he will sign with the Redskins, and then slowly fade out.