Extortion, in common law, an act of a public official who uses his or her position to obtain money or property illegally. Many states define the crime more broadly to include blackmail and similar acts committed by anyone.
It could happen: As you're rushing to get to the airport, you absentmindedly throw a gassed-up chain saw into your suitcase. Or a bag of live eels. Yes, TSA officials really spotted these items at U.S. airports. And stranger things, too.
Few incidents shaped the U.S. civil rights movement more than the brutal death of Emmett Till. What other murders have sent shock waves through the public psyche?