Early in the session, no real read. Villain had loose stats but the sample was too small to have any significant impact on the decision making. No showdowns seen.

Call or fold river, and how about the play earlier in the hand?

Party Poker No-Limit Hold'em, $2 BB (10 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

MP1 ($219.50)
MP2 ($497.22)
MP3 ($205.56)
CO ($200)
Button ($329)
SB ($465.86)
BB ($280.69)
UTG ($234.79)
Hero ($198)
UTG+2 ($231.45)

Preflop: Hero is UTG+1 with A, A. CO posts a blind of $2. SB posts a blind of $1.
UTG calls $2, Hero raises to $9, 4 folds, CO (poster) calls $7, 3 folds, UTG calls $7.

Flop: ($30) 4, 6, 5 (3 players)
UTG checks, Hero bets $20, CO calls $20, UTG folds.

Turn: ($70) J (2 players)
Hero bets $40, CO calls $40.

River: ($150) 4 (2 players)
Hero checks, CO bets $131 (All-In), Hero ??