An unprecedented spate of murders in the 1990s – seven in just three years – earned Goulburn Jail the ominous name of ‘The Killing Fields'. Inmates who were sentenced or transferred to the 130-year-old towering sandstone menace declared they had been given a death sentence.Gang alliances, power plays, contracted hits, the ice trade, the colour of your skin – even mistaken identity – any number of things could seal your fate.The worst race war in the history of Australian prisons saw several groups – Aboriginal, Lebanese, Asian, Islander and Anglo – wage a vicious and uncontrollable battle for power. Every day there were stabbings. Every day there were bashings. And then there was murderA controversial policy known as ‘racial clustering' might have put an end to the Killing Fields, but soon something far scarier would arise, something called Supermax . . . Within the stark white walls, clinical halls and solitary confinement, it is where Australia's most evil men are locked away. It is home to serial killer Ivan Milat; the ‘Terror Five', militants who plotted attacks across Sydney in 2005; Brothers 4 Life founder Bassam Hamzy and gang rapist Bilal Skaf, to name a few.