In incidents of gunfire on school grounds, up to 80 percent of shooters under 18 obtained the gun(s) they used from their home or the homes of relatives or friends.

“Protecting America’s Schools: A US Secret Service Analysis of Targeted School Violence”. National Threat Assessment Center. (2019), https://bit.ly/2U7vnwa Cox J., Rich S. “‘The Gun’s Not in the Closet’”. Washington Post. (2018).  https://wapo.st/2TyDnTW CDC, NCIPC, Division of Violence Prevention. “Source of Firearms Used by Students in School-Associated Violent Deaths, United States, 1992-1999,” MMWR Weekly. (2003). https://bit.ly/2RGthlo