I have to ask how this zombie came to your attention? It has been 23 years; surely you didn’t just stumble across this article while us0ing a microfiche at the library. You are not the OP. So what prompted you to add the postscript?
It was one of the “related” threads listed after a current thread. Given the arresting title it seemed worthy of opening, and then providing a resolution to it.
There are a shitload of functional sociopaths (clinical name “Antisocial Personality Disorder”) in the world (Trump, anybody?), but this guy is at the far end of the spectrum.
Oops, didn’t read far enough to see that this is a zombie.