Beware hidden pockets in hats
When conducting pat-downs and personal searches, be aware that normal-looking headwear can contain hidden pockets with potentially dangerous contents.
A variety of caps and hats are marketed online with concealed compartments, usually inside the crown.
These can be used by law-abiding citizens to hide cash, credit cards, and other valuables while out in public.
For suspects, though, they can be depositories for contraband or weapons.