Police informant's shock death exposes town's dark secret | Under Investigation with Liz Hayes

Subscribe here: http://9Soci.al/chmP50wA97J Full Episodes: https://9now.app.link/uNP4qBkmN6 | An Excellent Murder (2023) Donald Mackay was brave enough to stand up to the mafia in Griffith NSW, an Australian country town. But he paid the ultimate price. His enemies weren't just mafia living by the creed: "You speak, you die." He was also facing a political insider, in former federal Minister Al Grassby. WATCH more of Under Investigation: https://9now.nine.com.au/under-invest... LIKE Under Investigation on Facebook:   / underinvestigationau   FOLLOW Under Investigation on Twitter:   / 9investigation   FOLLOW Under Investigation on Instagram: @underinvestigationau #UInvestigate