In October 1978 three bodies are found at Spear Creek in remote outback Queensland - each has a single rifle shot to the head. Decades later a prime suspect is ruled out but did witnesses identify another man? In this special episode for Outback Murder Highway, Tim and Xanthe are joined again by investigative journalist Amelia Oberhardt to unpack the documentary investigation into the unsolved murders of Karen Edwards, Tim Thomson and Gordon Twaddle.&nbsp; <hr> You can watch the Outback Murder Highway TV documentary series 8.30pm Wednesday on Channel 9&nbsp; from April 22 to May 13. <a href="https://www.9now.com.au/outback-murder-highway">Or watch anytime here - on 9Now.</a>See <a href="https://omnystudio.com/listener">omnystudio.com/listener</a> for privacy information.

Bonus: John Twaddle [Extended Interview]

Motive &amp; Method is an expert-led Australian true crime podcast. Join Dr Xanthe Mallett and criminal psychologist Tim Watson-Munro as they unpack what really makes the offenders behind some of history’s most notorious cases tick, and also react and unpack crimes as they hit the headlines. You will also hear from victim survivors, investigators and advocates for change analysing motive, and method.