...... I would run background checks on:

a)anyone with a bald head
b)anyone wanting to hire four belly dancers for longer than an hour
c)anyone seeking treatment for chemical burns up to their elbows
d)anyone with a name ending in "wi"

That ought to do it I think. I believe this is a comprehensive
profile on which to base all future investigations which is likely
to save the government a ton of money and leave every body else
languishing in unmitigated freedom.