Columbine High School massacre "Christianity is YOUR Columbine". In a self-made video recording sent to the news media by Seung-Hui Cho prior to his committing the Virginia Tech shootings, he referred to the Columbine massacre as an apparent motivation. In the recording, he wore a backwards baseball cap and referred to Harris and Klebold as "martyrs." Adam Lanza, the perpetrator of the Sandy Hook Elementary School shooting had "an obsession with mass murders, in particular the April 1999 shootings at Columbine High School in Colorado." The perpetrator of the Emsdetten school shooting praised Harris in his diary. In November 2007, Pekka-Eric Auvinen imitated Columbine
Columbine (book) Columbine (book) Columbine is a non-fiction book written by Dave Cullen and published by Twelve (Hachette Book Group) on April 6, 2009. It is an examination of the Columbine High School massacre, perpetrated by Eric Harris and Dylan Klebold on April 20, 1999. The book covers two major storylines: the killers' evolution leading up to the attack, and the survivors' struggles with the aftermath over the next decade. Chapters alternate between the two stories. Graphic depictions of parts of the attack are included, in addition to the actual names of friends and family (the only exception being the pseudonym "Harriet",