Usually there are 3 things too look for in a hacker
#1 if they have a steam account above 40 million and they are GOOD as fuck, and look shady, its a pretty big red light that they may be hacking
Accounts over 40 million are fairly new accounts and most people will buy one just to try hacks or something
#2 If their mouse shakes every time they shoot some1, (now there are two different types of "Shakes", There are people who shoot by "Flicking" at someone and it may look like hacks but its a flick shot, usually flick shots are shot in one fast motion to the left or the right. Then there is the hack shaking, where the way they shoot isnt towards one direction, but goes left and right and even up and down RAPIDLY near the persons head, so watch for those two things)
#3 walling, a EASY way to tell if some1 is walling is their pointer,
Most wallers will get near a wall and look a little down, reason being is so their weapon is out of the way and they can see better (my analogy) what to look for is, if some1 is running towards that person, and they sort of react even though they havent seen them, some reactions are, plain old moving their cursor up and preaiming. NOW BE CAREFUL, headphone users do the same, only difference is they will start to aim up when the person is CLOSE to them, i know from experience, so look for people who pre aim at targets that are not close enough to be heard
and thats it
i saw his steam id, he's not even a 20 mill yet, i dont think he would try and wall to fuck his account up, and as fire said, he hasnt shown up in the logs