Plutonium

FragsAreUs That explains it, either he is in fact staff but i doubt he is because his account was created a day ago or he found some software that buypasses sv_cheats command because sv_cheats are off (i double checked). Either way it doesnt matter that much, he left in the meantime and if he comes back i can only pray the admins are present that can get him out of the game. Thank you for replying!

Did you made the loadout in public tab or did you create a lobby and did it there?

This dude is using some kind of cheat to make him invincible and no matter how much lead he ate during his knife streak he wouldn't die. Heres a video proof as well.
https://www.youtube.com/watch?v=czbeVP3ALT8

p.s. Sorry for bad quality