A miscarriage of justice on marijuana

US police are using a flawed scientific test in drugs busts that gives 'false positives' to strongarm citizens into plea bargaining
The Guardian (UK)
Thursday, August 4, 2011

As if America's highly-publicised "war on drugs" were not already facing a credibility gap, two US superior court judges – one in Washington, DC, another in Colorado – are raising questions about whether the federal Drug Enforcement Agency (DEA) and police departments are using "pseudo-scientific" drug identification methods to bust hundreds of thousands of suspected drug users, many of them inner-city minority kids. A flawed drug test means that innocent people are being locked up as suspects, deprived of their due process rights, and then pressured to accept plea bargains, whether they're guilty or not. The Duquenois-Levine test, widely used by police in the US, can detect marijuana, but also gives 'positive' results for numerous other commonly occurring substances.