In London, smartphone app to help catch criminals

Scotland Yard says it has loaded its "Facewatch" app with nearly 5,000 pictures of suspects wanted either in connection with low-level crime or the summer riots which hit the capital last year.

Users enter their postal code and are served with photos of wanted people taken in their area; they can flip through the photos or send in a name if they know the suspect.

The app is the latest addition to international law enforcement's electronic arsenal of crime-fighting programs, which includes everything from a U.S. Homeland Security reporting tool to an app that reads suspects their rights in Spanish.