Souvannarath , Shepherd , and Gamble all met on the website Tumblr , where they shared an obsession with death , true crime , heavy metal music , and Nazi imagery . Gamble 's blog included imagery of Nazis and the Columbine High School massacre , along with pictures of guns from World War II , and Shepherd 's contained death metal audio tracks and gore , whereas on Souvannarath 's blog , headlined with , " School Shooter Chic ; violence is the aesthetic , " she made many allusions to events of mass murder and mayhem in the month of February and as early as several months beforehand , interspersed with anti-Semitic comments in juxtaposition with posts of photo sets of Japanese fashion on her pastel-pink background . On February 5 , 2015 , Gamble reblogged a photo Souvannarath posted on Tumblr saying " Valentine 's Day , it 's going down " , hinting to the would-be shooting
Columbine High School massacre
Columbine High School massacre
Halifax mass shooting plot