I only have 43 hands on this villian but his stats were:
VPIP: 32
PFR: 27
STEAL: 57
Fold to 3bet: unknown
Fold to Cbet: 0
Poker Stars, $0.05/$0.10 No Limit Hold'em Cash, 4 Players
Poker Tools Powered By Holdem Manager - The Ultimate Poker Software Suite.
Hero (BB): $10.55 (105.5 bb)
CO: $14.20 (142 bb)
BTN: $9.18 (91.8 bb)
SB: $10.55 (105.5 bb)
Preflop: Hero is BB with A
K
CO folds, BTN raises to $0.30, SB calls $0.25, Hero raises to $1, BTN folds, SB calls $0.70
Flop: ($2.30) K
T 5 (2 players)
SB checks, Hero bets $1.30, SB calls $1.30
Turn: ($4.90) 2 (2 players)
SB checks, Hero bets $2.80, SB calls $2.80
River: ($10.50) 6 (2 players)
SB bets $5.45 and is all-in, Hero folds
Results:
Spoiler
$10.50 pot ($0.47 rake)
Final Board: K T 5 2 6
Hero mucked A K and lost (-$5.10 net)
SB mucked and won $10.03 ($4.93 net)
My thought process was that he could have a wide range calling my squeeze as he was new to the table and appeared very fishy.
I am confident I have the best hand on the turn and the flop because of his wide range and his passiveness. I think I could be getting value from worse kings, AT, straight and flush draws. I'm not too worried about a set or two pair as he has been so passive and is seems to be quite an aggressive player generally (at least preflop).
When he donk shoves the river I think for a while before deciding he is unlikely to do that with a worse king, AT, or a busted draw. So that only leaves a flush, set or two pair.
Is this a standard fold? Or could he have used the river scare card to turn his hand into a bluff? Are my thought processes ok?
Thanks! 
