That IS a speedhack.
The above poster made me think that, "
oh it's probably the last human speed and health boost".
For other people that are the watching the demo and want to see the "action":
Type demoui in the console.
Click Load.
Select the demo file.
Click Open.
Wait a moment for it to load your demo file.
Click Pause, on the demo ui box, around halfway through the demo.
Click Drive and use WASD + your mouse to move around (this is pretty glitchy so I recommend placing the camera at one point of the map where you know the action has happened).
(Optional: Type r_drawviewmodel 0 in the console.)
Click Resume and you should see a little kliener zipping around the center of the map.
To add onto the report, he was aimbotting the other day during 1me_zs_deathrun_sse.
Having someone I have never seen get 50 kills before the next guy can get 10 kills is very suspicious.
On top of this, it appears he is using cracked steam because he is not in the "View Players" list.
So if you see him, get the ID.