[jacbmw]

Stepping through the action on turn moving into the river, I think after he calls you turn bet his range is actually ahead (approx 60% to your 40%) IMO. I would treat the 9 on the river (4 to straight) as a blank as it would give him the straight with a very small % of his range (q10 and 10 10). Both these of these are very unlikely holdings for the villian assuming he is not retarded.

Moving to river, i C/c small bet, but usually c/f here.