New submitter managerialslime sends news that an Illinois judge has issued new requirements the government must meet before it can use cell-site simulators, a.k.a. "stingrays," to monitor the communications of suspected criminals. While it's likely to set precedent for pushing back against government surveillance powers, the ruling is specific to the Northern District of Illinois for now. What is surprising is Judge Johnston’s order to compel government investigators to not only obtain a warrant (which he acknowledges they do in this case), but also to not use them when "an inordinate number of innocent third parties’ information will be collected," such as at a public sporting event. This first requirement runs counter to the FBI’s previous claim that it can warrantlessly use stingrays in public places, where no reasonable expectation of privacy is granted. Second, the judge requires that the government "immediately destroy" collateral data collection within 48 hours (and prove it to the court). Finally, Judge Johnston also notes: "Third, law enforcement officers are prohibited from using any data acquired beyond that necessary to determine the cell phone information of the target. A cell-site simulator is simply too powerful of a device to be used and the information captured by it too vast to allow its use without specific authorization from a fully informed court."