Seven backpackers were murdered in the early 1990s by Ivan Milat, a road worker. It was discovered in September 1992 that British backpackers Caroline Clarke and Joanne Walters had been brutally murdered in the Belanglo State Forest. Ivan Milat, also known as The Backpacker Killer, is Australia’s most notorious serial killer, jailed for life in 1996 for the murder of seven young Australian and international backpackers and the disposal of their bodies, 90 minutes south of Sydney. Now, after Milat's death in maximum security prison, Australia's foremost criminal investigative team set out to prove Milat had many more victims, many more burial grounds, and there are dozens of families who have lost loved ones and need closure.