Bet JJ on this river? (shorthanded)

[Fadook]

Bizarre action pre and post flop really confused me in this hand.

CO is 29.69/22.77/2.22. Quite aggressive and tricky postflop, the type who plays aggressively on paired boards, bluffs scare cards, etc, but not downright insane.

BTN is 63.41/15.34/.9. Weird player who has bouts of random aggression. Sometimes he raises a hand like JTo after one limper, other times just limps. I've seen him limp AA before. Postflop he throws in random donks with a weak made hand or air, though his raises mean a strong hand. He always slowplays his strong hands, usually until the river.

.5/1 4-handed

Hero is SB with J[img]/images/graemlins/heart.gif[/img] J[img]/images/graemlins/diamond.gif[/img]

Preflop: CO raises, BTN calls, Hero 3-bets, BB folds, CO calls, BTN caps, Hero calls, CO calls.

Flop (13 SB): K[img]/images/graemlins/heart.gif[/img] A[img]/images/graemlins/club.gif[/img] Q[img]/images/graemlins/diamond.gif[/img]
Hero checks, CO checks, BTN checks.

Turn (6.5 BB): 8[img]/images/graemlins/club.gif[/img]
Hero checks, CO checks, BTN checks.

River (6.5 BB): 2[img]/images/graemlins/diamond.gif[/img]
Hero?

Easy bet? Both of these guys like to screwplay, but I could see CO being too afraid of the A to bet his K or Q, or that he had a smaller pocket pair.