SEATTLE (CBS Seattle) – According to a recent study, fatal car crashes involving pot use have tripled in the U.S. “Currently, one of nine drivers involved in fatal crashes would test positive for marijuana,” Dr. Guohua Li, director of the Center for Injury Epidemiology and Prevention at Columbia, and co-author of the study told HealthDay News. Researchers from Columbia University’s Mailman School of Public Health gathered data from six states – California, Hawaii, Illinois, New Hampshire, Rhode Island, and West Virginia – that perform toxicology tests on drivers involved in fatal car accidents. This data included over 23,500 drivers that...