It's obvious in my opinion. But no aimbot. Just wallhacks.
Go to tick 4900.
Kurtis was simply standing in the corner while Psycho was aiming up there,
then Kurtis goes out to the gap in the staircase and Psycho kills him knowing that he was coming that way.
Also, around tick 8300, when Kurtis was behind the props Psycho put up, Psycho equips his gun knowing that Kurtis was in the same room and was about to shoot him.