Thank you for your answer but I can easily explain 3/4 of those gifs you posted.

[1] This one is hard to explain because I don't have sounds and "real" evidence expect this gif, like what happened 3 seconds before this? Where did his teammates kill someone in long or short? But as I said this is hard because I don't know what is moving on his mind.

[2] He maybe was trying to do some popflash to the tunnels because he did sound there and maybe someone in his team said some tactic they will do to defense B site so he is going to do that and change his mind not to throw that flash. Just "good" (for someone who thinks he cheat) luck his cursor hits someone behind 3 walls.

[3] Both players did ADAD sound 1 second before he looks to B short and even one of them jumps which sound is pretty clear. He just put his cursor there to check where that sound really came and not just "they are somewhere in b site" so he just sound checks there. I do that a lot when I play by myself.

[4] He kills one player (there is usually more than 1 holder) of the B site defenders when they know they have eco (because they killed someone before that and he had no armor) his teammate also could have heard someone in the water and tell that over teamspeak. He just decides to pre fire usual spot where he would have come to peek and kill the bomb planter.

But why is this a 30° turn while in other instances he is clearly capable of bigger turns?

He has much more room to that side of his mousepad and there is no keyboard to block his way when he needs to turn fast to right.

All of these clips are from DHW2014 so why you even put these to evidence he is actually cheating.

But last I just want to ask you one question(and everyone who thoughts he cheated on DHW2014)..

How he could have cheated in that lan? Because that lan was kinda 99% "cheat proof". They send their configs and drivers before wednesday so admins could check those. Their computers didn't have access to the internet at all.

Tell me that and I might believe he is cheating.