What's the story?

Miscarriages of justice.

Can you be a bit more specific?

It’s the subject matter that will be tackled in Crime Files on BBC Scotland, tomorrow, at 9pm. The 10-part series, presented by renowned criminologist Professor David Wilson, delves into historic and contemporary cases.

Previous episodes have covered serial killers Peter Manuel, Peter Tobin and Bible John as well as gang culture and heists.

What does the latest episode tackle?

Professor Wilson interviews US defence attorney David Rudolf who featured in the acclaimed Netflix true crime documentary series, The Staircase.

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Rudolf lays bare the dangers of "confirmation bias" – or as he describes it "tunnel vision" – in wrongful convictions.

Any Scottish cases?

There's one from the Edwardian era described as the "world's worst ever miscarriage of justice".

That sounds chilling.

Indeed. Oscar Slater was wrongly convicted of the murder of 82-year-old Marion Gilchrist in 1908. Crime Files explores confirmation bias, the role that Sir Arthur Conan Doyle played in Slater’s release and why the case changed the face of the Scottish legal system.

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Anything else I need to know?

This episode marks the halfway point in the series. Crime Files will then take a break and return with five more episodes later this year.