Hopped on the servers to check out some reports of harassment, after a bit I saw Chad playing Ambassador Spy and getting some fishy shots, spectated him until he went to Sniper when it was increasingly obvious.
Important Ticks in attached demo
As you can see when he plays Sniper, especially towards the end, he gets outlandishly fishy and obvious. Most of my own review for the demo was done at the slower playback speeds (around 50%) and in doing so most of the flicks and tracking through walls is hilariously distinct.
(Bit of a side note, during the majority of the demo you can see the user ben arguing with the others on the server about him hacking and though its not in the demo, he was also arguing with I and the admin Roosef after the hacker was banned. Not once did ben actually spectate Chad during my time on the server.)