An anonymous reader shared this report from the Associated Pres : Okello Chatrie's cellphone gave him away. Chatrie made off with $195,000 from the bank he robbed in suburban Richmond, Virginia, and eluded the police until they turned to a powerful technological tool that erected a virtual fence and allowed them collect the location history of cellphone users near the crime scene... Now the Supreme Court will decide whether geofence warrants violate the Fourth Amendment's ban on unreasonable searches... Chatrie's appeal is one of two cases being argued Monday... Civil libertarians say that geofences amount to fishing expeditions that subject many innocent people to searches of private records merely because their cellphones happened to be in the vicinity of a crime. A Supreme Court ruling in favor of the technique could "unleash a much broader wave of similar reverse searches," law professors who study digital surveillance wrote the court...…