Dr Abdul Shakoor lost his wife and five children in a house fire in Harlow, Essex.
He shares his shock at the discoveries we've uncovered relating to the investigation.
Dr Shakoor still hopes that one day those responsible will be brought to justice.
Written and produced by Gabby Colenso Presenter: Sonia Watson Sound Design: John Cameron-McIntosh Story Consultants: Barney Rowntree and Ben Robinson Online Producer: Rachael Smith Series Editor: Shahid Hussain Commissioning Editor: Alistair Miskin
A BBC Essex production for BBC Sounds.