100NL: Turned double gutter

How many of you check behind here and how many keep firing? When he calls turn he has spades or Ax a lot, but when river hits that makes Ax less likely - is it enough for us to bluff the river?

$0.50/$1 No Limit Holdem
6 Players
Hand Conversion Powered by weaktight.com

Stacks:
UTG SAYCHEESE11 ($22.86)
UTG+1 U_WILL_L0SE ($195)
CO Necronomecon ($100)
BTN Hero ($107)
SB mol13 ($121)
BB koopjesjager ($275)

Pre-Flop: ($1.50, 6 players) Hero is BTN 10 Q
3 folds, Hero raises to $3, 1 fold, koopjesjager calls $2

Flop: A 4 J ($6.50, 2 players)
koopjesjager checks, Hero bets $4, koopjesjager calls $4

Turn: 8 ($14.50, 2 players)
koopjesjager checks, Hero bets $10, koopjesjager calls $10

River: A ($34.50, 2 players)
koopjesjager checks, Hero ???

Pretty sure this guy has AX a lot by the river and isn't likely folding JX either.

I think he doesn't fold a J now.

I def check since the turn didn't change anything...so I agree that he won't fold a J.