The “cell site simulator” is commonly called a “Stingray” device and is produced by the Harris Corporation. In essence, it is a movable device which mimics a cell phone tower, thereby tricking nearby cell phones into transmitting location data and other data to the device, rather than a real cell phone tower. Even more troubling, as Judge NeMoyer of the NYS Supreme Court in Erie County noted in his trial court order: “[e]vidently, cell site simulators also can be used to ascertain telephone calling information, such as the time of, the location from which, and the number of the call, and the device apparently allows for storage of that kind of information also for future review and analysis.” In re New York Civil Liberties Union v. Erie County Sheriff's Office, 2015 WL 1278798, at *2 (N.Y. Sup. 2015).While the Fourth Amendment and various federal and state statutes do allow for the targeted collection of data such as call records, phone location, and even recordings of texts and conversations (i.e. wiretaps) from the phones of persons suspected of criminal activity, the Stingray device is apparently capable of collecting data from all cell phones in the area in which it is deployed. That is, it spoofs and surveils innocent phone users in the area as well as the suspected criminal’s phone.
So what is a concerned privacy advocate to do? According to the Court, “the cell phone must be ‘on,’ with some battery life remaining, in order to be located and tracked by the device, but a call need not be in progress.” Therefore, if you turn your phone off when not in use, or the battery dies (a not uncommon occurrence with an iPhone), it might be protected from this type of roving law enforcement spying.
Beyond the obvious civil liberties concerns inherent in this kind of cell phone tracking and data collection by local police forces, Judge NeMoyer also unearthed a very practical law enforcement problem with use of this technology. According to a nondisclosure agreement that the Court reviewed, the FBI required the Erie County Sheriff’s Office “to conceal from the public the existence, technological capabilities, or uses of the device. Indeed, the Sheriff's Office is instructed, upon the request of the FBI, to seek dismissal of a criminal prosecution (insofar as the Sheriff's Office may retain influence over it) in lieu of making any possibly compromising public or even case-related revelations of any information concerning the cell site simulator or its use. If that is not an instruction that affects the public, nothing is.” In re New York Civil Liberties Union v. Erie County Sheriff's Office, 2015 WL 1278798, at *13 (N.Y. Sup. 2015).
So, ironically enough, local police may use this technology to track, trace, and apprehend criminals, but if the circumstances of their identification is possibly revealed by the ensuing prosecution, the police are required to drop the case against that person. In which case, the current use of these Stingray devices may be unique in being simultaneously violative of civilians’ Fourth Amendment rights against unlawful search and seizure, and ineffective at obtaining useful evidence in a criminal prosecution.