1/2 river hero call vs. overbet?

[zook]

No notes on villain, he's running 25/18/4.1 over a few hundred hands, steals CO 38%, folds to 3bets 56%.


Full Tilt No-Limit Hold'em, $2.00 BB (5 handed) - Full Tilt Converter Tool from FlopTurnRiver.com

saw flop

Button ($88.90)
SB ($306.50)
Hero (BB) ($388.60)
UTG ($200)
MP ($200)

Preflop: Hero is BB with 8, 7
1 fold, MP bets $7, 2 folds, Hero raises to $24, MP calls $17

Flop: ($49) 9, K, K (2 players)
Hero bets $28, MP calls $28

Turn: ($105) J (2 players)
Hero checks, MP checks

River: ($105) 7 (2 players)
Hero checks, MP bets $148 (All-In), Hero...