Go check out this site:
www.perverted-justice.com
They are all over them.
It's what I use for relief when I get too deep into the fight.
They truly are wonderful.
I would report this activity to them... maybe you want to help?
Wasn't he in a Jeep? Didn't they find a Jeep tag in one of the state parks? Could this Geocaching stuff be related to his travels?
Time for my tin foil hat?