Australia's first serial killer
Robert Travers had an urge to kill. Robert advertised in the local newspaper for gold prospecting partners. He would select those with no family ties. His unsuspecting prospects were taken to a location where they were to dig a hole under the guise of searching for gold. This hole became their grave...
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OK if this helps catch a killer.
Seems to me the author was highly influenced by Tim Acocks, the policeman-son of the murdered hairdresser.