[Editor's note: This post is excerpted from next week's forthcoming NORML weekly media advisory. To have NORML's news alerts and legislative advisories delivered straight to your in-box, sign up here.] Drug screening results, including those from federally certified labs, may not always be reliable, according to a white paper published online this week by the National Workrights Institute. “[Government] certified drug testing laboratories have significant reliability problems and that the government’s assurances that false positive test results are a thing of the past is untrue,” the paper concludes. The NWI [...]