[erc007]

I think i c/f the flop, turn, and river. Bet size on the river is kinda fishy, but if he has made lg bets with big hands before, he could just be getting greedy. You're only beating a bluff, so hero call or fold. I'd fold b/c your range for checking the flop + just calling the turn is the A or J of spades. It's not a good spot for him to bluff, b/c u never have anything but a spade here.