Whoa, whoa, whoa, whoa, whoa, whoa. I have not been drinking, sir. Sir, I really haven't been drinking. >> Imagine being arrested for DUI while completely sober. That's exactly what happened in Tennessee. A state trooper arrested eight drivers for DUI. But when the blood tests came back, every single one of them was sober. So, how does that even happen? Because DUI arrests usually happen before the chemical test. Police often rely on roadside sobriety tests, walking a line, standing on one leg, and following a pin. Tests that training materials from the National Highway Traffic Safety Administration say aren't perfect indicators of impairment. And in this case, eight sober drivers ended up in jail. But don't worry, the trooper was retrained. Three federal lawsuits are now underway. Full breakdown on the channel. Thin blue lies, baby.