In May 1998, a year before the massacre at Columbine High, 15-year-old Kip Kinkel murdered his mother and father, and then opened fire at Thurston High School in Springfield, Oregon, killing two fellow students and wounding 25 others. In this first in-depth television examination of a school shooter, FRONTLINE reveals the intimate inside story of how the “shy and likeable” Kip Kinkel from a solid middle-class family became the boy police call “a cold-hearted killer.”

• Documentary