Uh oh.
Not all psychopaths grow up to be killers. They become con men, financial criminals and abusers and destroyers.
It troubles me to hear that words don't reach him. Does he "act" out emotion or does he demonstrate it? Does he seem to lack empathy? Does he lie so often and so easily that you begin to find his lies are inconsistent and he almost can't control it? Does he know the meaning of words intellectually but seems to lack the ability to know the feeling?
Does he take a lot of risks in order to feel the stimulus another kid might feel by just riding a bike?
Or all of the above, including POTUS, like the IMPEACHED ex-42.