Lack of evidence? There are timestamps and a clear direction where and when to look at. By simply opening up the replay you will see that OS|Killua was clicking on en enemy hero without having vision on him and that he was showing his items. This is not lack of evidence. This is the evidence.
On a side note, everyone should be disturbed that a player with 6000 games is playing on a platform with a cheat and that nobody was able to realize that for years. Also, with all that has been said in this context, if correctly filling a format will make you open a replay and look into it then I will gladly repost the same data in a ‘correct’ manner.
In the meantime however, he will continue to play with his cheat destroying time of dozens of players. So, now when I think about it, I don't care. I did my part bringing this in front of everyone. What you will do about it and how you will approach it, what will be more important for you etc will speak only about you. My job here is done.