Not necessarily an admission of guilt, but Stephen Tanabe, the Contra Costa County Sheriff's deputy accused of setting up DUI busts to sully the good names of men who found themselves on the wrong end of Chris Butler's dirty private investigations, officially resigned yesterday. He was arrested for "possession and transfer of an assault rifle and conspiracy to possess and sell controlled substances" which is all related to the investigation in to the drug-dealing ring operated by Butler and former CoCo County Drug Czar Norman Wielsch.