Exclusive: Months before the boy’s slow and agonising death, a woman told police that William O’Sullivan had threatened to kill another child in his care. They branded her allegations ‘vexatious’
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New evidence uncovered by Guardian Australia reveals that Queensland police failed to act on repeated and serious warnings about a man who perpetrated one of Australia’s most shocking child abuse homicides.
Mason Jet Lee was 22 months old when he was punched in the stomach by his stepfather, William Andrew O’Sullivan – an ice user with a history of violent and controlling behaviour – in June 2016. The toddler’s small intestine was ruptured and he died a slow and painful death several days later, with no medical care.