In May 2016, police arrived at a farmhouse in Hillier, north of Adelaide. The scene that awaited them was horrifying beyond words.  Stephen Graham Peet had just murdered three people. The bodies of his girlfriend, Adeline Yvette Rigney-Wilson, and her two young children were inside.  But as his crimes unravelled in court, something became clear. Those two little kids shouldn’t have died. Their deaths, at least, were preventable. It was a series of failures from government agencies designed to protect them that actually, left them in the path of a killer. THE END BITS Subscribe to Mamamia CREDITS Guest: Sean Fewster You can listen to his podcast Just Lawful here. Host: Gemma Bath Executive Producer: Gia Moylan Audio Producer: Scott Stronach The story is not the first time we've covered systemic failures within domestic violence cases. If you found this episode interesting you might like to listen to one of these next: The System That Failed Hannah Clarke Six Deaths. One Uncomfortable Truth GET IN TOUCH: Feedback? We’re listening! Email us at [email protected] or send us a voice note, and one of our Podcast Producers will come back to you ASAP. Tell us what you really think so we can give you more of what you really want. Fill out this survey and you’ll go in the running to win one of five $100 gift vouchers. If any of the contents in this episode have caused distress, know that there is help available via Lifeline on 13 11 14 or Beyond Blue on 1300 22 4636 Mamamia acknowledges the Traditional Owners of the Land we have recorded this podcast on, the Gadigal people of the Eora Nation. We pay our respects to their Elders past and present and extend that respect to all Aboriginal and Torres Strait Islander cultures. Become a Mamamia subscriber: https://www.mamamia.com.au/subscribe See omnystudio.com/listener for privacy information.