I'm starting to embark on an effort to improve my poker theory as it need work at the moment so i'll take a stab at this and see how much of a tit i make myself look.
I'm torn between 2 hands to put him on. AK or J's. This is a problem because one of them has you beat and the other doesn't.
I think he must have something to raise like that on the river (unless he thinks your a chancer trying to steal the pot). The pre-flop suggests a decent starting hand which is why i'm with AK and J's and ruling out the 2's. A's are handy but losing to any K, Q's the same.
I think he's checking the flop praying for an A to come, make someone else a hand and get paid off. If he bets the flop after the pre-flop raise i think it scares the other players off.
The Turn card is likely both heaven and hell. Nails on his hand but doesn't help anyone who didn't already like the flop. Again i think the check and pray for the A. Danget being that the Q or 10 could make someone a straight (the A shouldn't as Q,10 i imagine is folded by now).
The river bet is curious to me simply because it doesn't stick you all-in (so my maths tells me). If he is that confident of winning why not take you for the last few $'s?
AK is now in trouble from KJ, K2 and K3. None of those too likely to be in this pot after the pre-flop (i've done it with KJ before largely to abuse from others).
I say he has AK and you call and take his money. J's is a tooth dryer and you suck it up and move on. K's.... what can you do. If it's K's i think he takes all your money though not leaving you in the last few $'s
Please rip that to shreads, i need to learn