This guy was very loose pre and post flop and just lost a big hand w/ KK so I figured he may possibly be on tilt. Obviously he's not very good if he's betting $1 on the river. What is the best move here?
***** Hand History for Game 4554118413 *****
0/0 Texas Hold'em Game Table (NL) - Mon Jun 19 23:13:11 EDT 2006
Table Table 108722 (No DP) (Real Money) -- Seat 4 is the button
Total number of players : 6
Seat 1: ChiYou_Carab ( $138.11)
Seat 2: Dooud ( $284.84)
Seat 3: brandoNKRI ( $45.20)
Seat 4: Hero ( $251.70)
Seat 5: puckhead23 ( $93.02)
Seat 6: PokerWink_com ( $33.61)
puckhead23 posts small blind (0.50)
PokerWink_com posts big blind (1)
** Dealing down cards **
Dealt to Hero [ 6d, 6s ]
ChiYou_Carab raises (4) to 4
brandoNKRI folds.
Hero calls (4)
puckhead23 calls (3.50)
PokerWink_com calls (3)
** Dealing Flop ** : [ 6c, 5s, Kh ]
puckhead23 checks.
PokerWink_com checks.
ChiYou_Carab bets (5)
Hero calls (5)
puckhead23 folds.
PokerWink_com folds.
** Dealing Turn ** : [ Ac ]
ChiYou_Carab checks.
Hero bets (19)
ChiYou_Carab calls (19)
** Dealing River ** : [ 8h ]
ChiYou_Carab bets (1)