What would a Role model Admin do in these situations?

[SG.]

So say there is TerroristA,TerroristB and Terrorist C along with Counter-Terrorist X and Counter-Terrorist Y left in the round.
CT X Freekills A, A uses "@" to tell the admin that he was freekilled. What should an admin do if he hadn't seen this in action? 

I think that a role model admin should confront this issue by asking the offender and the victim by asking what has happened and hear both of their stories. Often, both side would tell some bunch of nonsense. In this case, the victim should be told that he confront the issue along with the evidence on the forums. 

From my experience, The admin just said that he did not see it and ignored it. He didn't ask what happened nor ask the offender the reason he Killed for. It didn't happen once or twice, but about a dozen times in few maps and not once did he actually take actions against this offender. I will not reveal the name of this admin for now. However, If he does read this, I ask that he stops being a so ignorant.