Police stop driver after receiving citizen cell phone 911 report of erratic operation at approximately 11:00 a m. Police see an open 16 oz. PBR in the center console. Driver admits to drinking the beer while driving home. Police request he exit to participate in HGN, WAT and OLS tests. Driver struggles with physical tests, but also notifies officer that he suffers from internal injury and intestinal issues that effect his balance. Post arrest blood test one (1) hour after driving is .074 BAC as well as positive for cannabis and benzodiazepines. DUI charge dismissed prior to trial.