I often look at plays like this as a reraise on the flop. If he had reraised you $10 on the flop what would you have done? By calling and then leading out on the turn, this indicates that he can beat a pair of Kings, or he has at least AK, either way you are beat. If he is making a move on you it's just a helluva play, but if he is, you will catch him later. This is where I stuggle a bit--having the patience to wait to pick someone off later who I suspect might be stealing from me.

Enjoy Life!