PokerStars - $1 NL FAST (6 max) - Holdem - 6 players
Hand converted by PokerTracker 4
BTN: 102.25 BB (VPIP: 20.57, PFR: 18.09, 3Bet Preflop: 10.19, Hands: 291)
SB: 299.04 BB (VPIP: 21.40, PFR: 17.47, 3Bet Preflop: 6.14, Hands: 3,486)
BB: 101.73 BB (VPIP: 24.57, PFR: 18.73, 3Bet Preflop: 7.19, Hands: 419)
UTG: 100 BB (VPIP: 23.50, PFR: 19.13, 3Bet Preflop: 6.85, Hands: 186)
Hero (MP): 105.5 BB
CO: 156.98 BB (VPIP: 33.08, PFR: 25.56, 3Bet Preflop: 4.26, Hands: 136)
SB posts SB 0.5 BB, BB posts BB 1 BB
Pre Flop: (pot: 1.5 BB) Hero has A♠ K♦
UTG raises to 3 BB, Hero calls 3 BB, fold, fold, fold, fold
Flop: (7.5 BB, 2 players) K♠ 4♠ K♣
UTG bets 5 BB, Hero calls 5 BB
Turn: (17.5 BB, 2 players) 5♦
UTG checks, Hero bets 9 BB, UTG raises to 27.5 BB, Hero calls 18.5 BB
River: (72.5 BB, 2 players) 9♦
UTG bets 22 BB, 
UTG has 19% RFI .
Have a note on him that he is kind of crazy and likes to bluff aggressively. On the river he is most likely bluffing but if he isn't I am ahead of his possible value range of 55-44,AKs,KTs+,KJo+ and with his small sizing it does not look like he has the nuts.
So should I raise the river and if I should how much? Is maybe minraising better than just going all in?
