Poker Folding queens full?

This hand was from a £60 live tournament last night. 90 runners. 71 left. The tournament is a freezeout. So no entries. The tournament is full of the poker room regulars. Bit of info on villain. He’s a poker room regular. Decent player. I’ve seen him fold a lot of top pairs on the flop, generally playing quite tight and not doing anything out of the ordinary. In one hand i had quads on the river and raised him and he folded top pair and started saying how it’s a freezeout and he doesn’t want to go out this early. He also said this again when involved with another player when he just called with the second nuts on the river.

So here is the hand. 75k starting stack.

Stack sizes: Hero 98k. CO 64k. BB 84k. Blinds 400/800.

I raise UTG to 2,000 with QcQh.
CO calls
BB squeezes to 7,000 from the BB
I call.
CO calls.

Flop
8d8hKc

Checked around

Turn 7s

Checked around

River Qs

BB bets 4,000
I raise to 17,000
CO folds.

BB thinks for about 10 seconds before moving allin for about 73k.

I did think about it for 2 minutes before folding. His previous comments about not wanting to bust because it‘s a freezeout and folding straights and top pairs i was really adamant he had kings full. I don’t think for one minute he’s doing this with AA or AK. I don’t think there are any 8’s in his range either as he squeezed to 7,000 pre. I’m certain he’s just flatting with 88 and A8. And i don’t think he’s just going to be shoving as a complete bluff. The only hand that makes sense to me is KK. So yeah i ended up folding. I will never know what he had. But i’m pretty confident in my fold. I’d love to here other’s views. Maybe i’m underestimating him? Not sure. Thanks!

Source