Yeah the more and more I thought about it afterwords, I think it's a call. Just a crazy spot to bluff with a check raise. My mistake was betting the turn, I had thoughts of checking the turn. While he was active in 3 betting out of the blinds, he wasn't ever out of line when it came to the turn or river--he played it pretty straight forward throughout the tournament.
Oh well, it was one of those decisions that haunted me all day yesterday, and I'm slowly getting over it. Considering I had a huge suckout with AK vs KK during 8 handed play, I'll take 5th gladly--no complaining here
Thanks guys for the feedback.