behind bars after being found guilty of the manslaughter of two small boys, aged four and three.The 11-year-old strangled the boys to death and butchered one of them with scissors, mutilating his genitals.Her first killing, when she was just ten years old, saw her strangle four-year-old Martin Brown in an upstairs bedroom of an abandoned building in Scotswood, England.She left the scene and later returned with Norma Bell, a friend and neighbour, to find that the body of the young boy had already been found by three children who were playing in the area.A local workman who had rushed to the scene after being alerted by the horrified children ushered the two girls out of the house – completely unaware that Mary was the killer revisiting her.
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