Norway's journal of criminal law, claims that such searches breach Norwegian law. Detector dogs have been used by secret police and security services to support campaigns of political persecution. For example, sweat collected from subjects following interrogation was used by the Stasi to train dogs to respond to their scent. See also References Further reading NPR's All Things Considered: Using Dogs to Sniff Out Bed Bugs Fox Philadelphia: "Bed Bug Dog and Bed Bug Control Experts discussing use of Bed Bug Dogs" Braverman, Irus. 2013. "Passing the Sniff Test: Police Dogs as Surveillance Technology." Buffalo Law Review 61 (81): 81–167. Blum, Binyamin. 2017. "The Hounds of Empire: Forensic Dog Tracking in Britain and Its Colonies, 1888-1953." Law and History Review 35: 621–65. External links Dog training and behavior Explosive detection Scent hounds Working dogs