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　　For every psychopath there are signs. Would you see them? Revisiting some of the most dangerous killers in modern history to see which psychopathic traits they exhibited. Featuring real archive footage. 　　每一个精神病患者都有迹象。你会看到他们吗？重温一些现代史上最危险的杀手，看看他们表现出哪些精神变态的特征。以真实的档案片段为特色。