My Ko script is not functioning correctly?

note:this is not the full script; the problem is every thing works except for when the humanoid's health is zero is doesn't create the string value which shows which player killed the humanoid, neither does the "You Killed"gui

function e(plr,hit,Target,Dmg,raycf)
	spawn(function()
	local ray=Ray.new(raycf.p,(hit.p-raycf.p).unit*300)
	local Hit,Pos=workspace:FindPartOnRay(ray,Ignore)
	if Hit.Parent:FindFirstChildWhichIsA("Humanoid")~=nil then
		if game.Players:GetPlayerFromCharacter(Hit.Parent)~=nil then
		if game.Players:GetPlayerFromCharacter(Hit.Parent).TeamData.Team.Value~=plr.TeamData.Team.Value then
		Hit.Parent:FindFirstChildWhichIsA("Humanoid"):TakeDamage(Dmg)
		if Hit.Parent:FindFirstChildWhichIsA("Humanoid").Health==0 then
			spawn(function()
			local clone = script.kill:Clone()
			clone.Parent=plr.PlayerGui
			clone.TextLabel.Text="[!+100! you killed]"..Hit.Parent.Name
			local killer=Instance.new("StringValue",Hit.Parent:FindFirstChildWhichIsA("Humanoid"))
			killer.Name="Killer"
			killer.Value=plr.Name
			wait(3)
			clone:Destroy()
			end)
		end
		end
		end
	end
	local raypart=Instance.new("Part",workspace)
	raypart.Anchored=true
	raypart.Material="Neon"
	raypart.Color=Color3.fromRGB(255,0,0)
	raypart.CanCollide=false
	raypart.Name=plr.Name
	local Dist=(Pos-raycf.p).magnitude
	raypart.Size=Vector3.new(0.1,0.1,Dist)
	raypart.CFrame=CFrame.new(raycf.p,Pos)*CFrame.new(0,0,-Dist/2)
	game.Debris:AddItem(raypart,0.1)
	end)
end

game.ReplicatedStorage.Remotes.Shoot.OnServerEvent:Connect(e)