Austin Allen Eis rammed his car into a group of students outside Westlake High School in Thousand Oaks in 2023. The crash happened after Eis stabbed an employee at a Walmart store in Simi Valley.
Eis then made his way to his parents' home in Camarillo, where an argument led to police being summoned. That incident was followed by the collision in Thousand Oaks.
Wesley Welling was killed in that crash and three other students -- another 15-year-old boy and two girls, ages 14 and 16 -- were injured.
Mother shares last words to teen son who died in Thousand Oaks crash near Westlake High School
Eis was sentenced Tuesday after emotional victim impact statements from survivors and family members of the victim in court.
Eis pleaded guilty in February to murder, assault with a deadly weapon and other charges.