The Backpacker Murders is a name given to a serial killing case that occurred in New South Wales, Australia during the 1990s. The bodies of seven missing young people were discovered partly buried in the Belanglo State Forest, 15 kilometres south west of the town of Berrima, New South Wales. Five of the victims were international backpackers visiting Australia, and two were Australian travellers from Melbourne. Ivan Milat was convicted of the murders and is serving a life sentence in prison.
The term Backpacker murders specifically refers to the seven murders for which Ivan Milat was convicted. There is some speculation that Milat may have committed up to thirty more killings but this has never been determined.
http://en.wikipedia.org/wiki/Backpacker_murders