Auvinen had a number of online accounts , including two YouTube accounts under the aliases of Sturmgeist89 and NaturalSelector89 he used to upload videos about school shootings and violent incidents , including the Columbine High School massacre , the Waco siege , the Tokyo subway sarin attack , and bombing during the Iraq invasion . Shortly before the shooting , Auvinen posted a video of him displaying his weapon and shooting at apples . Before the attack his final video was posted , " Jokela High School Massacre - 11/7/2007 " , depicting red-filtered pictures of the shooter holding his firearm and a photo of Jokela High School . Several months before the shooting , an American YouTube vlogger , TJ Kirk , called for authorities to investigate accounts with content on school shootings , including one used by Auvinen . " Robin McVeigh " later organized the small but vocal community of online individuals who idolized mass killers ( such as Auvinen ) into slandering both the vlogger and the female YouTuber friend who told Kirk of the dangers by claiming the two had bullied Auvinen , despite multiple attempts on Kirk 's part to reach out to Auvinen for emotional support . A spokesman for the cyber crime department of Helsinki police has stated that " it 's highly probable that there was some form of contact between Pekka-Eric Auvinen and Dillon Cossey " , a 14-year-old boy arrested in October on suspicion of planning an attack on his school in a suburb of Philadelphia . What seemed to have linked the two was a middle-aged homicidal anarchist whose username on YouTube was " Robin McVeigh " ( a nod to the domestic terrorist Timothy McVeigh , who she idolized along with Eric Harris and Dylan Klebold as well as other well-known school killers ) . She would routinely attack those who disagreed with murder and threatened the lives of many YouTube users . She was also connected to the second " YouTube Killer " Dillion Cossey
Columbine High School massacre
Columbine High School massacre
Jokela school shooting