I would teleport Player [X[, I would listen his side of story and I would ask him for proves, then I would teleport Player [Y] to same place, and listen his side of story, gather his proves, and if it turns Player [X] killed Player [Y] without reason I would warn Player [X] for (RDM) and for Player [Y] I would give him verbal warning for breaking NLR, otherwise I would warn Player [Y] for breaking NLR