Composite Sketches
Compostite sketch of Chicago strip mall shooter.
Composite sketching has been around for longer than most people think. The first drawing system for the purpose of criminal identification was devised in 1896. In 1910, a drawing…
Theft Detection Products
Invisible Fluorescent Pen
This pen is used to mark porous items, such as currency and other paper. The pen's markings become visible when exposed to UV light.
Fluorescent crayons can be used to secretly mark a variety…
Constitutional Search Warrant Requirements
Contrary to the belief of some, and to the image that's sometimes portrayed on television, police officers cannot enter a private residence without a warrant or permission to do so. Of course there are exceptions to every rule, but…