Lymuel was convicted in October of killing 10-year-old Chris Fields two days before Christmas 2006 during a drive-by shooting at Iris Avenue and Kitching Street in Moreno Valley.
Police said Lymuel shot the boy in the head. Both Lymuel and the boy were sitting in cars that were sitting side by side behind a red traffic light.
Lymuel was convicted of murder and two counts of attempted murder with a special circumstance of killing during a drive-by shooting.
City News Service contributed to this report.