Sometimes, the killers appear to lack any excuse at all, as in the case of Eric Harris and Dylan Klebold, who in 1999 shot 12 fellow-students and a teacher at their high school in Columbine, Colorado. In that case, people blamed the sadistic video games and movies that the killers had been watching.
有时凶手的行为似乎没有任何理由，正如1999年科罗拉多州科隆比纳高中枪击案中杀害12名同学和一位老师的埃里克·哈里斯（Eric Harris）和迪兰·克雷布（Dylan Klebold）那样。人们指责是那些宣扬暴力虐杀的电脑游戏和电影影响了凶手的行为。但绝大多数这类娱乐产品的爱好者都不会动手杀人。