A man looks at his cell phone as he walks on the street in downtown Madrid, Thursday, Oct. 31, 2013. (AP/Francisco Seco)

INVESTIGATION: Secrecy Around ‘Stingray’ Cell Surveillance Persists Despite Growing Transparency Efforts

The federal government, local police departments and the Harris Corporation are participating in a coordinated effort to keep the public in the dark about the full capabilities of cell site simulator surveillance devices, also known as Stingrays.