Liquid K2, a kind of synthetic marijuana that causes erratic behavior when smoked, is currently being smuggled to inmates through the mail, sprayed on letters and pages of publications. This kind of K2 is far more challenging to detect than standard leafy K2 products which look far more like cannabis. https://bookmarkboom.com/story17075096/the-single-best-strategy-to-use-for-k2-spray-on-paper