This is a great article on lying and deception. Its not specifically focused on law enforcement and security but the information is no less valuable. there is plenty to learn from this study.

Fred

• The Guardian, Saturday 8 August 2009
• Article history

Illustration: Demetrios Psillos

Hillary Clinton, while campaigning for the US Democratic presidential nomination last spring, described a memorable trip she made to war-torn Bosnia more than a decade earlier. "I remember landing under sniper fire," she said. "There was supposed to be some kind of a greeting ceremony at the airport, but instead we just ran with our heads down to get into the vehicles to get to our base." News footage, however, showed Clinton strolling calmly with her daughter, Chelsea, upon arrival. During that same election cycle, Mitt Romney, a candidate for the Republican nomination, claimed his father, George Romney, a former Michigan governor, had "marched with Martin Luther King". It was soon revealed that the elder Romney had never actually done so. continue reading