Prisoner X
In December 2010, a prisoner was found dead in his cell at one of Israel's maximum security prisons. He hung himself after 10 months in solitary confinement under 24/7 surveillance. None of the guards knew his name, or the nature of his crime. They knew him only as “Prisoner X” — someone who must have done something unspeakable. The Prisoner’s identity remained a mystery for another three years until 2013 when Australian journalist Trevor Bormann broke the news that the prisoner was Australian citizen Ben Zygier, an alleged Mossad agent.