I can attest to the aimbotting of the player in question. What's funny is that when it's off he's god awful in aiming. However when it's turned on, it's instant headshot no matter how close you are at taking him out.

In the italy demo it's most clear that he's using an aimbot and other hacks to gain advantage.

Another example is being point blank with a p90 and still not being able to damage him one bit while he is using an ak getting only headshots (can tell by the sound)

mind you this is RPG server so there are some stat buffs. But the demos are clear evidence imho.