Police watch houses are maximum security facilities designed to hold the most dangerous adult prisoners, but in Queensland, children as young as 10 are being locked here as well.

With exclusive access, Four Corners takes you inside the locked cells of a Queensland watch house, to see what conditions are like.

This investigation comes almost three years after Four Corners exposed shocking mistreatment in the Northern Territory’s Don Dale youth detention centre in Australia’s Shame, sparking a Royal Commission.

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