Were you shoving the turn for value or as a bluff? Neither really makes much sense imo. Also you say he'd been more aggressive recently - had you seen him get to showdown at all? Or are you presuming he's now playing a bit looser?

I'd call the turn here, we let him bet his weaker aces, double barrel if he's that aggro (although this isn't really the best card to double barrel, and he is OOP).

If the river was blank and he fires again I think its a tough spot as I can't see him showing up with less than AK/AQ - UNLESS I'd seen him show up with junk recently I'd probably ditch it to 3 bets.

NOTE: I'm back playing after about 2 years away from poker.