You may want to change your game tracker to your actual game tracker profile:
www.gametracker.com/player/%5BToxic%20Pi.../94.23.19.200:27015/
I would check the logs for the kill from when y was killed by x and if y has killed x in a matter of 3 minutes or less i would warn y for breaking NLR, but if the kills are shown 3 minutes or more apart from each other i would not warn them and i would then proceed to ask the reason y killed x after the NLR timer.
Just because y killed x in less than 10 minutes does not necessarily mean that y broke NLR.
Apart from that, you have shown increased maturity and have been reporting rule breakers for the staff to handle which if you keep up I believe you are moderator materiel.
+Support