When I receive a message from someone who claims to have told the police the real story of what had happened to Fred over 12 months ago, and now wants to tell me, I’m interested. This episode is his story, and it’s fascinating.

Trying to find the identity of the man at the bar, I stumble upon something unforeseen that casts a new light on the early stages of the police investigation that may have fascinating implications.

I finally get to speak to someone I’d been trying to speak to for a few months – and something they say stops me in my tracks. Something that links a living person in 1969 with the body found in 1971.

We receive a second anonymous letter, but are things exactly what they appear to be? We dig deeper into who was living on the Level and at Frank Kun’s old addresses which yields another mystery, and I have a fascinating conversation with someone who worked on Bass’s Meadow in the 1960s, which makes me think more about what might have been going on there.

I try and retrace the car journey to identify exactly where the young man was dropped off. We discover the final pieces of the Mr Czenner story and uncover another address I really need to investigate

In a longer than usual episode, I’m on the track of Matthew James Jackson and with the help of some great detective work from a listener, we are able to inch closer to the truth. And having spoken to one of Zoe’s old school friends, another long conversation with Zoe really intrigues me.

I uncover the reason why the police believed the dentistry to be unusual, and what that tells us about the police investigation and the victim. Developing other lines of enquiry leads me back to Zoe in Australia, who shares even more intriguing memories.

I manage to find the Scenes of Crimes Officer from the time of the discovery of the body, the man who dug the body out of the ground and the first person to see the body since the murderer, and I learn some fascinating new facts. Then, things take an unexpected and intriguing turn.

A new discovery takes me on an unexpected detour, and takes me on the trail of another missing man

I needed to find the exact date of a story that appeared in the Burton Mail, as it could provide vital information. But how was I going to find three consecutive years of newspapers from 50 years ago - and what would they reveal?