Help please

[usi34]

This is a hand I observed last night at a local moose lodge. My friend was involved and he is looking for some advice on how to play this.

The game was 1/2NL with no cap on the buy-in.
The table is 9 handed and generally tight with 1 or 2 loose players.

Hero is considered a tight player.
Villian is an older guy who plays for the enjoyment(gambling). He is a very bad player who has trouble folding. Money is not an issue for him.

1/2 Blinds. UTG live straddles for $4.
UTG+1 folds.
UTG+2(Villian) calls. ($250)
MP2 Calls.
Hero calls in the Cutoff with A [img]/images/graemlins/club.gif[/img] J [img]/images/graemlins/club.gif[/img]($70)
Button calls.
SB Calls.
BB Calls.

$28 dollars going into the flop.

A [img]/images/graemlins/heart.gif[/img] 10 [img]/images/graemlins/diamond.gif[/img] J [img]/images/graemlins/heart.gif[/img].

Checked around to hero who bets $12.

Folded around to Villian who calls.

$56 dollars going into the turn.

Turn card came a 8 [img]/images/graemlins/club.gif[/img]

Villan checks. Hero bets $12. Villian calls.

$84 dollars going into the river.

River comes Q [img]/images/graemlins/heart.gif[/img].

Villian checks. Whats hero's move?

Comments on all streets appreciated.