serial killer and necrophile honed his craft by killing his own grandparents years before a bloody crusade that ended with him having sex with his own mother's decapitated head.Of all the wrong un's currently rotting in high-security US jails, it could be strongly argued that Edmund Kemper is the worst - such is his prodigious hate and disregard for human life.
Standing at an imposing 6ft 9ins tall, Kemper endured a troubled childhood which played a part in transforming the 73-year-old into the monster who would butcher ten people. READ MORE: Serial killer had sex with mother's decapitated head before ripping out her larynxKemper's mum Clarnell Stage was an alcoholic who often mocked and belittled her son and turned a blind eye to his macabre tendencies, such as murdering cats.
When he was just 15, a juvenile Kemper got into an argument with his grandmother while staying at their home in California.Rather than stew on this like any normal teenager would, Kemper returned to the house with a shot gun and killed both grandparents.
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