Columbine Mine massacre Serene for two weeks, for the Columbine was one of the few coal mines in the state to remain in operation. On November 21, 1927, five hundred miners, some accompanied by their wives and children, arrived at the north gate just before dawn. They carried three Flags of the United States. At the direction of Josephine Roche, daughter of the recently- deceased owner of the Rocky Mountain Fuel Company, the picketers had been served coffee and doughnuts on previous mornings. That morning, the recently-disbanded state police, also known as the Colorado Rangers, were recalled to duty and would meet the
Columbine High School massacre from their classmates and associating themselves with the previous perpetrators. A 2014 investigation by ABC News identified "at least 17 attacks and another 36 alleged plots or serious threats against schools since the assault on Columbine High School that can be tied to the 1999 massacre." Ties identified by ABC News included online research by the perpetrators into the Columbine shooting, clipping news coverage and images of Columbine, explicit statements of admiration of Harris and Klebold, such as writings in journals and on social media, in video posts, and in police interviews, timing planned to an anniversary of Columbine, plans