TB was stopped by a roadblock. He hadn't even committed any traffic violations, but the officer at the roadblock claimed he could smell alcohol. So TB was told to pull over. The officer conducted an HGN test (pen test) and claimed that TB failed (showed all six clues). TB was charged with DUI and taken to jail. TB's job and livelihood were on the line. We showed the HGN was not performed properly, and because the government couldn't show any poor driving, the DUI was dismissed.