Kipland Philip "Kip" Kinkel is a schizophrenic spree killer who, on May 20, 1998, murdered his parents, and then committed a school shooting at his former school, Thurston High, killing two students and injuring dozens of others. The shooting at Thurston High was considered the deadliest shooting at an American high school until the April 20, 1999 Columbine High School massacre perpetrated by Eric Harris and Dylan Klebold.