SANTA ANA, Calif. — A judge on Friday formally sentenced to death the man who kidnapped, sexually assaulted and murdered 5-year-old Samantha Runnion (search) in 2002 — a case that led to the expansion of child abduction alerts on electronic billboards along California's freeways. A jury convicted former factory worker Alejandro Avila (search), 30, in April and voted for the death penalty in May. On Friday, Superior Court Judge William R. Froeberg endorsed the jury's recommendation. "You shall suffer the death penalty," the judge told Avila, who looked away.