Police use Unreliable Tests for Marijuana

A British newspaper article is calling attention to the U.S.'s use of the Duquenois-Levine test for identifying substances they suspect to be marijuana.  The article claims the test is unreliable, often incorrectly identifying material as the drug. 

It cites the example of a woman in Florida recently busted because she had a bag of sage in her purse; police didn't believe her, and charged her after the sage was misidentified as pot using the flawed Duquenois-Levine test.  Many defense experts are also questioning the use of the test.  Read more here.