That was my first reaction, too -- that he'd suicide in the wilds of Peru and that eventually his remains would have to be identified via DNA analysis.
However, quite a few freepers have mentioned that serial killers almost NEVER commit suicide, although people who 'snap' and go on a rampage will suddenly feel extreme remorse and thus off themselves.
Psychopaths don't feel GUILT, they have no conscience, so feel no need to suicide and in Joran's case he is such a severe example of Narcissistic Personality Disorder, that he'd NEVER ever do anything to harm his own luvable self.
That's how I understood the postings about this, anyway.