By MARLENE NAANES mnaanes@theadvocate.com Advocate staff writer Gary Bennett tearfully begged for forgiveness Wednesday before a judge sentenced him to the maximum sentence for a drunken-driving wreck that killed a 42-year-old man. Bennett, 45, claimed he has changed since he was arrested last year in the death of Gary Christian. State District Judge Todd Hernandez told Bennett, who was arrested 37 times in 27 years, that he had enough chances and sentenced him to 20 years in prison for vehicular homicide. "The criminal justice system has shown more than its share of patience and understanding," Hernandez told Bennett. "You've been...