AddRelationship doesn't work?

[Zenocut]

Im trying to make it so citizen's will attack you, if you kill one of them:

GM = gmod.GetGamemode()

E = ents.FindByClass("npc_citizen")

function GM:OnNPCKilled( victim, killer, weapon )
   if(victim:GetClass() == "npc_citizen" and killer:IsPlayer() and victim:Disposition(killer) != 1 ) then
       Msg(victim:Disposition(killer))
       for k,v in pairs(killer:GetTable()) do
           E:AddRelationship("player D_HT 99")
        end
    end
   end
end

I get this:

[c👌de_g🎷]

Call ents.FindByClass inside the function instead of caching it outside. Loop over that instead of killer:GetTable(). Also, use hooks instead of overriding gamemode functions unless you're making a gamemode.

[Zenocut]

I don't use hooks just because I don't understand how to use one

[c👌de_g🎷]

hook.Add("OnNPCKilled", "Some identifier", function()
-- Code
end)