The Essex Boys were thieves, cowards, and murderers, but their kids deserve to know who killed them.
In 2010 one of Australia's most notorious crime bosses, Carl Williams, was murdered at Victoria's Barwon Prison. A little over a year later the prison's general manager, David Prideaux, disappeared on a hunting trip. His body has never been found.
54 years ago this month, the northern part of the Urals played host to one of the most fascinating unsolved mysteries in the modern age.