Liquid K2, a sort of artificial cannabis that triggers erratic behavior when smoked, is getting smuggled to inmates throughout the mail, sprayed on letters and web pages of textbooks. This way of K2 is much harder to detect than classic leafy K2 products which look a lot more like cannabis. https://keybookmarks.com/story17073370/the-smart-trick-of-k2-spray-on-paper-that-no-one-is-discussing