Hmm, now this is a hard one. Check the demo, in the first ~7-8 Seconds he's clearly using an aimbot, and I started recording the demo because some kills before recording looked like aimbotted. But after that, no aimbot any more. He's certainly a very good player, but I suspect he intermittently uses an aimbot nevertheless and stopped using it because he thought (knew?) I was speccing him. What do you think? I took no action so far, his IP: 87.0.30.68 (Rome, Italy).
BTW, what are the commands to rewind/forward/step a recorded demo?