He was using a weird kind of aimbot which spinned out. I've never seen this before.
00:35 - Aimbot spins out
00:58 - Aimbot spins out
1:05-1:10 - Aimlock
1:21 - Aimlock & snap
1:26 - Aimbot spins out
1:55 - Aimsnap
2:24-2:37 - Several snaps & kills with strange sound change while firing. (Bug?)
3:09-3:21 - (Probably) wallhack
3:58 - Aimbot-twista
4:05 - aimsnap at "invisible" Mafioso
There is actually no need for a video since he admitted he is not clean as you can see here @22:47.
I can't wait to bust him again