Stingray devices (IMSI catchers), manufactured by Harris Corporation, masquerade as cell towers to intercept phone communications. Police used them for years without warrants or court oversight, often describing them in misleading terms to judges. Florida police revealed in 2014 they had used Stingrays 200+ times since 2010 without disclosing it to courts. The devices collect data from every phone in range, not just the target. The FBI required police departments to sign NDAs preventing them from disclosing the technology's use, even to judges.