Suspected cheating (not an "online poker is rigged" post)

[ddss6_99]

I play in a regular home game with a group of friends from class. There's this one player that we all suspect of cheating, but nobody can prove it with hard evidence. The amount of freaky hands he has are ridiculous. EX-1. Friendly home game, i forget what was going on, but he was the dealer and we were all distracted by something, might have been the tv. Nobody was watching him shuffle the deck because of this. He called Omaha for his game (dealer's choice) so to make a long story short, my full house gets cracked by his AAKK double suited full house. Wierd, but w/e.
EX-2 This happened today. His deal again in the friendly home game, we're all just talking and stuff while we play, nobody really watching intently for cheating or anything. Same guy calls Omaha again for his game( no big deal, that's his favorite game). I get dealt KKxx and the flop comes down KxA, I was already suspicious from the beggining. The turn brought another A and he bet out. I said that there was something shady about this hand and mucked my Kings over Aces face up, and wouldn't you know it, the suspect turns over AA for quad aces. Now these are just a few hands, but this kind of stuff happens regularly. I've never seen someone have so many pocket pairs that hit in my life, but only on his deal.
Some people who aren't even in my home game have given me the idea that he's cheating. One guy I was talking to about our game told me about how the guy we suspect of cheating showed him some card trick where he brings a certain card to the top of the deck "magically". Another guy overheard a couple friends and I talk about our game and said "Oh man you guys play poker with xxxx, you're crazy he's a cheater. He showed me how once." When we confronted the suspected cheater about this he gave us some story about how it was when he was permenant dealer and wasn't even in the game and he was just fooling around looking at the cards before they came and signaling a player. We tell him to stop cheating every time, but mostly in a joking manner. We don't want to really be harsh because he's a friend of ours, but it's really starting to make me mad. I'm wondering what the best course of action would be. Every time we confront him about it, he adamently denys cheating.