Scientists have developed a new type of drug test that can tell whether you have taken cocaine by analyzing chemical traces left behind in your fingerprint. Researchers believe their fingerprint method would be quicker, less invasive, more accurate, more hygienic and harder to fake than existing tests. The new method could help law enforcement to carry out portable drug tests within the next decade. The team believes they would be able to deliver first working unit to medical law enforcement personnel within next few years. The method would also be useful for the workplace testing, where you want high-throughput.
Source: https://thehackernews.com/2015/05/cocaine-fingerprint-test.html