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 High School massacre school shootings in the US in the following eight years and found that in eight of those, "the shooters made explicit reference to Harris and Klebold." Larkin wrote "Numerous post-Columbine rampage shooters referred directly to Columbine as their inspiration; others attempted to supersede the Columbine shootings in body count." In 2012, sociologist Nathalie E. Paton of the National Center for Scientific Research in Paris analyzed the videos created by post-Columbine school shooting perpetrators. A recurring set of motifs was found, including explicit statements of admiration and identification with previous perpetrators. Paton said the videos serve the perpetrators by distinguishing themselves