Liquid K2, a kind of artificial marijuana that causes erratic conduct when smoked, is being smuggled to inmates through the mail, sprayed on letters and web pages of textbooks. This way of K2 is far more difficult to detect than regular leafy K2 products which seem much more like marijuana. https://atozbookmarkc.com/story17261698/little-known-facts-about-k2-spray-on-paper