[Cheap Shot]

First hand when he leads out on the river its clearly for value. Even from a week player. I would suspect two pair. Possibly even as simple as A8. He hit his weak kicker, now he bets. I suspect you are beat here - not a bad laydown. I only say this because of the betting pattern of a typical 1/2 player. On the second hand when you raise on the turn and he calls he is trapping or drawing. When the board pairs and he bets extremely weak - 19 dollars into the 50 dollar or more pot. I suspected he has a weak hand. But he could still be ahead of you and wants a cheap showdown. With his gutshot+spade draw you are behind on the turn. If you could have seen his hand on the turn you would have not called the 4 dollar bet. So in retrospect I think once your steal attemp on the turn fails I would not be putting anymore money in the pot. But I would also laydown the AQ even to 4 dollars. Such a small amount in the pot. Seems like better spots to pick on the draw heavy board.