In this 4th and final episode we delve further into the mind of a killer. We speak to the Professor of Psychology at Edge Hill University - Geoff Beattie and Security Correspondent with the Irish News, Allison Morris.Marian’s brother Gerard takes Vinny to her graveside and has a final message for the person responsible and anyone who can assist the PSNI investigation. This is a special Nolan Show podcast, following the events of the night of March 30th 1973, and the police hunt that followed. That night 18 year old Marian Beattie left her family home to attend a dance on the outskirts of Aughnacloy. She would be found dead the following morning. Do you have information relating to Marian's murder? Contact the PSNI on their non-emergency 101 number. Or you can contact Crimestoppers on 0800 555 111.This podcast series is presented by Stephen Nolan, with Vinny Hurrell.Produced by Vinny Hurrell.