[DpR]

I think that if the guy is erratic/tricky/wierd enough to donk the river after the previous action with something worse then a mid-weak ace, then I think it is best to just call down rather than rasie the turn.

I make sure that I note the guys that like to donk most every street whenther they have a hand or not. Then I can be sure not to use a free s.d. play on them.

I can't be sure given the description whether or not you have a good river call here. IMO, a player that is just aggresive does not bet this river with a hand you beat. It needs to be one of those erratic players that make many 'out of tempo' bets.

Persoanlly, I would only take his line with an ace I was unsure of.