Justin Bieber Tested Positive for Marijuana, Prescription Drugs During DUI Arrest On January 23rd, teen pop idol Justin Bieber was arrested on DUI charges in Miami while reportedly drag racing. Now, his DUI toxicology report has come back, and the singer has tested positive for marijuana and prescription drugs as well. A urine sample taken while Bieber was jailed on DUI charges showed that the pop star had THC as well as Alprazolam, known by the brand name Xanax, in his system. Reportedly, Bieber confessed to police that he was driving … [Read more...]