Evil Week: How to Spot Undercover Cops and Unmarked Police Cars
by Stephen Johnson from Lifehacker on (#5TPXV)
Law enforcement officers and agents will hide who they are for all kinds of reasons, from catching speeders to infiltrating extremist political groups to preventing the kidnappings of state governors. It's often hard to recognize undercover cops, but there are some tells, so here's a rough guide to recognizing cops...