New update for this thread

Update 29/05/2017 Sorry, I don't know the rule but this kind of hack is different so I need Riot to research that specific situation. That not a ranked match so I need to paste the screenshot cause I cannot pass to you the history link of the match. Only that match uniquely have that specific problem.

@CannonLordFreed: That not the problem of hitbox. If Riot care about it and have the log of the match or replay, they will really know what happening. Have you ever seen a champion hit by a skill, flash into the turret, out of reach of any damage or range of any opponent and 5 second later, die for nothing? Have you ever have 1200 health and the reason you die is 300-400 damage from all sources?