A DUI case from Marion County is setting precedent in Kentucky for setting up and executing DUI checkpoints and roadblocks. The Supreme Court of Kentucky overturned a DUI conviction because a Kentucky State Police checkpoint violated the Fourth Amendment of the U.S. Constitution and Section 10 of Kentucky Constitution. According to a court case in Marion County, Billy Cox was convicted of driving under the influence after being stopped at a roadblock. The documents state Cox was stopped for not wearing his seatbelt but a trooper smelled alcohol on his breath and he ultimately failed three sobriety tests. But the court of appeals found that the KSP roadblock violated search and seizure law so Cox’s conviction was overturned. In this case, evidence against Cox was deemed invalid because the roadblock was not “readily apparent to approaching motorists.”