Opinion: Police want to keep surveillance tech secret

If you use a cellphone and live in one of these 20 states, there’s a decent chance police have spied on you using a secretive mass surveillance tool called a stingray. But good luck finding out. Because if there’s one thing we know for sure about these devices, it’s that the federal government is fighting tooth and nail to stop you from ever learning anything about them.

Stingrays (also known as cell-site simulators, IMSI catchers and dirtboxes) are devices that identify and track cellphones en masse by acting like fake cell towers, fooling all nearby phones into connecting to them. Last year documents obtained through the Freedom of Information Act revealed that the Federal Bureau of Investigation is requiring state and local police departments to sign nondisclosure agreements before obtaining the devices. But the details of those secret agreements were always completely redacted.

That is until earlier this week, when the ACLU released new stingray documents, including an agreement between the FBI and police in Erie County, New York. It confirms what privacy advocates have suspected: The federal government is intervening at the state and local level to hide information about stingrays at any cost — even when it means withholding evidence or dropping criminal cases. Continue>>>