““The Stasi had developed a quasi-scientific method, ‘smell sampling’, as a way to find criminals. The theory was that we all have our own identifying odour, which we leave on everything we touch. These smells can be captured and, with the help of trained sniffer dogs, compared to find a match. The Stasi would take its dogs and jars to a location where they suspected an illegal meeting had occurred, and see if the dogs could pick up the scents of the people whose essences were captured in the jars.””
