Kerry Corbin spent years working at Queensland’s Wolston Correctional Centre, a “protection” prison dedicated to the sex offenders, paedophiles and child killers who wouldn’t survive in the mainstream prison population without being served a dose of “prison justice” by the other inmates.  He reveals the tell-tale sign of a paedophile, his dealings with Daniel Morcombe’s killer and the vicious attack that ended his career in corrections. Every episode of On Guard, plus articles, amazing images and the multimedia experience is available right now, go to onguardseries.com.au See omnystudio.com/listener for privacy information.