Cell phone data analysis dials in crime networks

Sometimes not picking up the phone can be as incriminating as spilling the beans on a wiretapped call. After a recent string of robberies in Italy, a new forensic tool that makes it easy to explore reams of cell phone data revealed an incriminating pattern: Leading up to and after each robbery, there were flurries of calls between members of a gang suspected in a series of gun thefts, car thefts and supermarket stickups.