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)