@Gavir if I remember correctly you came into TS complaining about RDM that was not even happening to you. You saw another player get killed without being told anything.
I told you then, the player could be getting texted or be in a private phone call with the player. Arma does not have the ability to log voice channels.
With that in mind, as many others have said and too repeat what I told you then. Record and report and we will do the very best we can to make amends to the player wronged, not to the random guy trying to report others when they are not part of the event in question.