Murder mystery

As a child in the late 1970s or early 1980s I remember watching a TV programme concerning mysteries/unsolved crimes, which I believe was on the ATV region of ITV covering the Midlands region. The segment that stuck in my memory was about the murder in the 1920s or 1930s of an elderly farmer who had spent the evening drinking at the village pub. He was shot without knowing it on his walk home. Once back at his farmhouse, he went to bed and was discovered the next morning having bled overnight, with the bedsheets being covered in blood (although my memory might have added this detail). He survived long enough to tell the police that he had not fought or argued with anyone on his way home, but had heard a popping sound coming from a hedge. There were no obvious suspects and the murder was never solved. A firearms expert at the time claimed the weapon was a cane gun, a walking stick with a gun built into it capable of firing a single shot.

I have tried in vain to find the case over the years in books, online and sites such as YouTube. Does it ring a bell with anyone? Darren Fowkes

Ilkeston, Derbyshire