Mason Lee was punched so hard his bowel ruptured. New evidence reveals police ignored repeated warnings about toddler’s killer (opens original article in a new tab)

New evidence shows Queensland police ignored repeated warnings about William Andrew O'Sullivan, who killed 22-month-old Mason Lee, with a woman's allegations marked as 'vexatious' and police failing to act on his violent history.

• Queensland police failed to act on warnings about William Andrew O'Sullivan, who killed 22-month-old Mason Lee by punching him in the stomach
• A woman's allegations that O'Sullivan threatened to kill a child were marked as 'vexatious' in police records, leading to ignored warnings
• The coroner withheld evidence of police failures from the inquest, including a report detailing how police flagged O'Sullivan's file as non-urgent
• O'Sullivan had a history of violence and drug use, and police ignored multiple warnings about his dangerous behavior
• Child safety officials and the mother were initially blamed, but police failures were also significant