As8s mid pos

[pianist]

The 3 on the turn obviously helped UTG, and that can only be the case if he has 33, A3, J3s, or 83s. The problem with bad players like this is there's just no way to tell which of these hands he misplayed. However, there are more A3/J3s/83s hands he could have than there are combinations that make 33. So technically speaking, even if you have no clue at all what he has, three-betting the turn is a value bet. Then when he doesn't four-bet, you can be even more sure he's on two pair and can also bet or raise for value on the river.