A 59-year-old Arizona elementary school principal was arrested on Tuesday for allegedly placing online advertising requesting teen girls to go skinny-dipping with him at his home. According to the Pinal County Sheriff’s Office, 59-year-old Karl Judd Waggoner was arrested near the school Tuesday. Police say Waggoner posted ads soliciting teen girls to go skinny dipping with him at his home. Read: 21-Year-Old Man Arrested After Shooting 3 People In Ybor City Parking Garage Investigators say a sex crimes detective conducted an undercover investigation, posing as a 14-year-old girl, after spotting…