Arizona authorities briefly detained a man for questioning in the disappearance of Nancy Guthrie . And the man, later identified as a local delivery driver, told reporters that he had no idea who the elderly woman even was. A spokeswoman for the Pima County Sheriff's Department said that deputies detained the man during a traffic stop south of Tucson on Tuesday. That man was later identified in news reports as Carlos Palazuelos, who said he was driving around working when authorities stopped