The prisoner who tortured Daniel Morcombe's killer has woken up a free man following his release on parole.
A Queensland Corrective Services spokesman confirmed Adam Paul Davidson was freed on Wednesday, just one month after he was sentenced to three years' jail for the vigilante crime.
Brisbane District Court Judge Ian Dearden decided to "take a chance" on the father-of-four and grant him early release.
Davidson filled a mop bucket from a hot water urn and tipped it over Brett Peter Cowan's head on August 5, 2016, while the convicted killer was playing cards with inmates at the high-security Wolston Correctional Centre in Wacol.
Cowan was treated in hospital for superficial burns to 15 per cent of his body but has since recovered from his injuries.
He is serving a life sentence for the abduction and murder of Daniel on the Sunshine Coast in December 2003.
The 13-year-old's remains were found in August 2011, after an elaborate police operation prompted Cowan to confess and lead undercover officers to where he dumped the teenager's body.
