On Guard is a new podcast series that takes you behind behind the scenes to uncover what really goes on behind bars, as former correctional officers share shocking secrets from the frontline working with some of Australia's most infamous criminals.

You can get episodes of On Guard, plus a full multimedia experience right now, go to onguardseries.com.au to view all of the True Crime Australia subscriber exclusives.<p>See <a href="https://omnystudio.com/listener">omnystudio.com/listener</a> for privacy information.</p>

In Australia former detective Roger Rogerson has come to epitomise the bad cop - up to his elbows in corruption of public officials, drug crime and murder. The Daily Telegraph crime editor Mark Morri and former NSW Assistant Commissioner Clive Small discuss Rogerson's life and crimes from his career in the criminal investigation branch in the 1960s to the murder of drug dealer Jamie Gao in 2014.