The Bogle-Chandler mystery is recognised as one of the most baffling cold cases in the annals of crime.

The victims, brilliant physicist Dr Gilbert Bogle and Mrs Margaret Chandler, the wife of his colleague, were found dead beside a picturesque river in Sydney, Australia.

Investigators found no evidence to suggest how they had died. The bizarre manner in which the bodies were covered only added to the mystery. The police immediately suspected Geoffrey Chandler as the killer.

But despite drawing on the expertise of police and forensic agencies around the world, the coroner was unable to determine how the victims met their fate.

In his award-winning film and book on the case, the author presented new evidence, which provided a solution to the mystery. This revised edition, brimming with photos and original documents, features the explosive testimony of a previously unknown witness to the deaths - a testimony that has thrust the case back onto the coroner's desk.