The CIA said thanks but no thanks to San Francisco psychologist Paul Ekman when he offered years ago to teach special agents how to read faces to detect deception.

Today, the CIA is one of dozens of agencies and companies calling Ekman, who runs the Human Interaction Lab at UC San Francisco.

Law enforcement isn’t the only group that’s done an about-face on Ekman, who can tick off the Latin names for all 43 facial muscles one moment and identify the precise muscles used by Bill Clinton when he lied about Monica Lewinsky the next. More here.