Example Killer Script by RoxoR

AddEventHandler('baseevents:onPlayerKilled', function(killer, kilerT)
    if(GetPlayerName(killer) ~= nil and GetPlayerName(source) ~= nil)then
        TriggerClientEvent('chatMessage', -1, '', { 0, 0x99, 255 }, ..GetPlayerName(killer).."^1 has killed"..GetPlayerName(source)..)
    end
end)