Robert Reasoner, a supervising investigator with the Nevada Transporation Authority, who allegedly apparently drove his state-owned vehicle into a car parked on a Carson City street and fled the scene, has resigned. He was charged with hit-and-run and having an open container of alcohol in his vehicle for that incident, but it turned out he had a record of DUI arrests, at least two of them after he went to work for the state. The Department of Business and Industry launched an investigation , but before it was completed, he was arrested again, this time for buying heroin, while apparently driving drunk with an open bottle of Vodka. The mess led to two other state employees--including his immediate supervisor--were fired. Rather than be interviewed by investigators this week, he quit. His state retirement benefits are apparently unaffected.