A contributing factor for these school shootings is that each of the shooters was given access to guns even though they had mental issues. The Columbine shooters had a friend buy their guns. Howard Pankratz, form The Denver Post, reported that a co-worker of Harris and Klebold introduced them to Mark Manes, the guy that sold them the guns they used in the shooting. Harris and Klebold met up with Manes at a gun show and purchased one of the guns used. This purchase was illegal since both Harris and Klebold were minors. The remaining guns used in the shooting were purchased from private sellers, but were bought legally from a friend of Harris and Klebold. Once the legal guns were in the possession of both shooters, they modified the guns making
