This is an important excerpt that we should note:
'The most efficient tool for victim discovery is the use of cadaver-detection dogs. These dogs are specifically trained to detect the volatile organic compounds (VOCs) that are released from deceased and decomposing individuals. As a deceased individual undergoes decomposition, VOCs are created through the catabolism of the major biological macromolecules (proteins, carbohydrates, and lipids).
21,
22,
23,
24,
25These VOCs are constantly produced throughout all stages of decomposition
22 and diffuse into the surrounding environment. The dispersal of VOCs from decomposing human remains allows for their detection by these specialized detection dogs.'
Refer the document for the cited references as they are lengthy.
Cadaver-detection dogs should be housed in every state in Australia with immediate access to get these dogs onto the ground to do their work.