Someone at the heart of the case is found dead and future prosecutions are called into doubt. A new name takes centre stage. Who had access to the master keycards and what was their role in Michaela’s death? There are serious claims of attempted bribery. Presented by Allison Morris & Darragh MacIntyre Produced by Vinny Hurrell & Raphaelle O'Loan Executive Editor: Andy Martin A BBC Northern Ireland Production If you are suffering distress or despair, details of help and support are available at https://www.bbc.co.uk/actionline/