OAKLAND — A 61-year-old Orinda real estate executive and former Saint Mary's College professor pleaded guilty Friday morning to producing child pornography in a case in which he traveled to Costa Rica to have sex with a 12-year-old girl.Leonard Auerbach faces a minimum sentence of 15 years in prison and a maximum of 30 years.No family members or friends attended the hearing. Auerbach, dressed in a red Alameda County Jail jumpsuit, answered the judge's questions with simple "Yes, sir," responses.In April, Auerbach fled the country after charges were initially filed. After being named a "most wanted" fugitive by U.S. Immigration...