How do i make monster despawn after pathnodes

[FlawlessHappiness]

Make a script area around the last pathnode and make it

void OnStart()
{
AddEntityCollideCallback("brute", "ScriptArea_1", "OnBruteCollide_1", true, 1);
}

void OnBruteCollide_1(string &in asParent, string &in asChild, int alState)
{
SetEntityActive("brute", false);
}