Comments:Man kills five police officers in Shanghai

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Alleged Motive for Attack
There are allegations that the attack was an act of revenge. The attacker accuses the police of having beaten him during a past interrogation, ultimately leaving him infertile due to trauma sustained to his genitalia. The stigma of infertility in Chinese society is tantamount to that of divorce in Chinese society--namely that he has no chance of marrying or starting a family after the fact.