[rue (td)]

NEW EVIDENCE:
In this video the main focus is the beginning. Watch as he deagles some dude in the head and it looks like the shot isnt even remotely close but it lands anyway.  Second is that he gets shot  at immediately after killing that dude and knows exactly where he is getting shot from.  

https://streamable.com/h1x8b

1. the reason he looks like he's shooting and he's not near is because of spectator interpolation, it sucks shit in all source games, and because of all the addons on dinks it sucks even more shit. the feature you think he's using has been patched in gmod since 2017
2. idk if him know where he's getting shot from is really evidence of wallhacks, he could know the map (despite the 25 hours) and he turned around and most likely saw muzzle flash or bullet trail (idk if those pop up on spec, probably not)