Liquid K2, a sort of synthetic marijuana that causes erratic conduct when smoked, is currently being smuggled to inmates through the mail, sprayed on letters and pages of books. This kind of K2 is far harder to detect than traditional leafy K2 products which search a lot more like cannabis. https://www.tumblr.com/factsabouteverythingseo/748651429729812480/strongest-k2-spray-on-paper-strongest-k2-spray?source=share