A man with a broken tail-light on his car is now in jail. Nevada County Undersheriff Joe Salivar says a deputy saw a car driven by 56 year-old Keith Christopherson of Grass Valley. The car had a lighting problem and he was going to advise the driver. Salivar says the deputy saw a partially-consumed bottle of an alcoholic beverage. The man was asked to perform a field sobriety test, which he quickly failed. He informed the deputy his license was suspended for a prior drunk driving incident. Salivar says when Christopherson was taken into custody his car was searched.