An insight into the mind of Queensland cop killer Ricky Maddison We’re sorry, this service is currently unavailable. Please try again later. Dismiss Normal text size Advertisement Queensland cop killer Ricky Maddison was depressed, alone, broke, prone to wild mood swings and consumed by a loathing of authorities and his former partner in his final hours. Multiple examples of communication breakdowns within the Queensland Police Service in the lead-up to Senior Constable Brett Forte’s death were also uncovered and highlighted this week. Ricky Maddison was wanted for domestic violence offences when he killed Senior Constable Brett Forte. Credit:Seven News