When he checkraises the turn, it's most often one of three things:
1. A slowplayed AA or KK,
2. AK who checked the flop UI and hit what he thinks is an out on the turn, or
3. A bluff.
If it's 1 or 2, you're going to manage to get the rest of the chips in on the river regardless of what you do on the turn. He's not going to stop betting, and all you have to do is to put him all-in on the river.
If he's bluffing
, you don't want to raise now since there's no value in it. Force him to try to bluff again on the river.
In other words: Call the turn bet. Put him all-in on the river no matter what happens. And don't worry about a river all-in being a big overbet, since he'll call any bet on the river with what remains of his non-bluffing range, and he won't call any
bet on the river with his bluffing range.