In Spain there was a case of a missing woman, and the authorities tracked phones which moved in the same direction of the victims one to get a reduced list. The

In Spain there was a case of a missing woman, and the authorities tracked phones which moved in the same direction of the victims one to get a reduced list. The attacker disposed of the phone from a bridge after 5 or 10 minutes, but even with that the police have already an small list of suspects and have an start point to investigate. Anyway, they have to wait and they didn't get to trap the attacker until a year later when he tried to attack other victim.