A notorious Western Australia child killer who served 24 years for murdering a mother and son is back behind bars.
Robert Barry Pearce killed his ex-girlfriend and her son in 1984.
The boy, Jaime Dunderdale was stabbed more than 40 times.
Pearce was then involved in a 1990 plot to blow up the walls of Fremantle Prison.
There was a major controversy when Pearce was released from jail in 2008.
On Monday night he allegedly used a knife to threaten a service station worker in the Western Australia town of Albany, before stealing money and cigarettes.
Pearce handed himself into the Police and has been remanded in custody.
by Milo Johnson