Complex sentence: During Dog's incarceration, Leland's parents divorced; he didn't see his father again until he was eight years old, when Dog gained visitation rights to see him and his brother, Duane Lee.
Split into simpler sentences: During Dog's incarceration, Leland's parents divorced. He was unable to see his father again until he was eight years old, when Dog gained visitation rights to see him and his brother, Duane Lee.