I had some evidence he was pretty fishy, I was in a hand with him when he was calling down my pot-sized bets when I flopped the flush. Or first he raised me, I 3-bet and he called down big bets on turn and river. Board was KJT hearts, 5 not heart, J not heart. He had AK with no hearts. Looks pretty fishy to me, it's only one hand though, so yeah, I think folding was correct.