You guys are talking like a bunch of Hufflepuffs. Ban his ID and move on, it's not a big deal.
He can't be that smart, he has a VAC ban on his account already. There have been smart,
long standing cheaters around the community before.
No public hacks have been released, I'm pretty sure of that, However, Coders can easily code their own hacks for the game.
Engine hacks from other Source games will generally work. However these always result in VAC bans. So they're essentially worthless.
Wallhacks are worthless in GE:S too, for the most part because we have the radar anyway! Plus wallhackers are always too blatant.
VAC isn't perfect but it deals with the 98% of cases. The other 2% are easily managed by active server admins. Ban IP, ban Steam ID and
problem finish.