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
Kerch Polytechnic College massacre to serial killers. Surveillance footage of the incident shows Roslyakov wearing black trousers and a white T-shirt emblazoned with the Russian word "НЕНАВИСТЬ" (hatred) as he carries an eight-shot 12 gauge Hatsan Escort Aimguard pump-action shotgun with a pistol grip. His clothing resembles that of Eric Harris, one of the perpetrators of the 1999 Columbine High School massacre, leading to speculation that the massacre was a copycat crime. According to some Russian tabloids, he had been a member of various Eric Harris and Dylan Klebold fanclubs on social networks, and had informed friends of his belief "it would be good