PIs & "secret squirrels"....
I can understand the points/remarks of the last post. My father spent many years in medical/human resources & saw a lot of
fraud/waste/abuse.
I'd add, doing security work in many places(both public & private), I've ran afoul(and sometimes it was
foul ) of cops, PIs, federal agents(later confirmed, don't ask
), bounty hunters/bail agents, ex-spouses/boyfriend-girlfriend, rental/property/bill/tax collectors, repo-tow truck guys.
A few were legit & polite, some were highly unprofessional #%*+.
Id agree with saving the information, if the vehicle or stranger returns or others come around the same way, note the pertinent details & contact your local LE agency's crime prevention or "tipster" hotline.
Don't contact 911 unless you are in
serious danger or a threat is apparent. Most US law enforcement offices have a non emergency # too.
A good tip I picked up in US Army basic training is to remember:
SALUTE. When documenting or recalling any needed details, say; SIZE, ACTIVITY, LOCATION, UNIT, TIME, EQUIPMENT.
The more information you can recall the better. Damage, marks, logos on the vehicle; if the occupants smoked, was the van old or new, were windows tinted, etc?