They're the crimes that continue to haunt grieving family members and the wider community - cold case murders.
Cold Case Western Australia is the official podcast of WA Police Force which examines unsolved murders.
The series includes in-depth interviews with detectives investigating the cases, and with family members of the victims. Cold Case Western Australia is hosted by Neil Poh - a veteran crime reporter and a former media advisor for WA Police Force.
The series has been commissioned as part of new efforts to obtain information from the public about this confronting, unsolved murders.
Listen now on Spotify, Apple Podcasts or the WA Police Force website.