This is a true story.
In 1910, a cashier, was murdered on a train in the UK.
A few days later, John Alexander Dickman was arrested and charged.
He was tried in July and was convicted on circumstantial evidence.
He was hanged in August.
This book re-examines all the evidence and concludes that Dickman's conviction was unsafe.
It then goes on to name the real killer after more than 100 years.