On the 28th of April 1926, Detective Inspector Walsh and Detective Sergeant
Pitman, were attached to the Gold Stealing Squad investigating unlawful
processing of gold, south of Kalgoorlie. 

During their patrol, they came across Phillip John Treffene and William Charles
Coulter, illegally processing gold in the bush, on approaching the men, both
police officers were shot dead.

In an attempt to dispose of the bodies, both police officers were mutilated and
partially burned before being discarded down a disused mine shaft. 

An extensive police search began with the assistance of local trackers and on 12th
of May 1926, their charred and dismembered bodies were found in the disused
mine shaft at Millers Find, nearly 10 kilometres south-west of Kalgoorlie.

Treffene and Coulter were later found guilty of the murders, they were hanged together at Fremantle Prison in 1927. 

 Detective Inspector Walsh was given a Police funeral with full honours.