Liquid K2, a style of synthetic cannabis that causes erratic behavior when smoked, is becoming smuggled to inmates through the mail, sprayed on letters and web pages of books. This kind of K2 is way tougher to detect than regular leafy K2 products that seem a lot more like cannabis. https://www.tumblr.com/factsabouteverythingseo/748651429729812480/strongest-k2-spray-on-paper-strongest-k2-spray?source=share