Perhaps consider making up A4, and some A3, size
paper posters offering a reward for finding the location
of that '2016 Toyota Prius'. If it were me doing it, I'd
set the reward at 500 U.S. dollars, with it to be paid
to no more than three claimaints ($500 each person),
claimable upon location to be sent to some given email
address including a photograph of the found vehicle
AND information as to what named law enforcement
officer at what police station the information MUST
also have been reported to. (Law enforcement
officers not eligibile to make a claim).
That year/model had a somewhat easily recognizable
wheel design and the vehicles rear aspect also fairly
recognizable, so a (EXACT vehicle copy of what you
KNOW their vehicle actually looked like, including the
colour) only side view & rear view (from about 15
metres away) pictures would be on the poster.
(A wrecked, crashed/burned vehicle might be so
damaged that the wheels and rear aspect might be
the only quite still recognizable parts of the vehicle
anyway).
If they came to grief from criminal activity, someone
might be tempted enough to say where the vehicle
remains. If they came to grief from misadventure
(accident off the road down into a ravine or jungle),
the reward might spark enough interest that some
young guy might go looking with a couple of friends
at potential accident sites. (Rather than just one
person, who even if they found it, might be afraid
the policia will try to make a big-note case by
framing them, false confession, etc., which would
be more unlikely with multiple people. Such things
happen down there).
I assume you'll eventually have someone, a private
detective or knowledgeable local person, make
enquiries down there. Maybe get that person, or
concurrently hire someone else, to put up those
posters with cloth gaffer tape (normal sticky tape
pretty quickly fails in the heat in those countries),
in shops/hotel noticeboards along whatever you
determine are the most route-likely local towns/
hovels. (If you or others are going down there
eventually, maybe consider taking some drones
and many batteries, if you are thinking to check
places along likely-routes where they might have
gone down into a ravine.)
Code:
https://www.spytalk.co/p/nearly-600-americans-missing-in-mexico
