Mark Willacy is an Australian investigative journalist for the Australian Broadcasting Corporation (ABC). He, along with ABC Investigations-Four Corners team, won the 2020 Gold Walkley for their special report Killing Field, which covered alleged Australian war crimes.[1] He has been awarded six other Walkley awards and two Queensland Clarion Awards for Queensland Journalist of the Year.[2] Willacy is currently based in Brisbane, and was previously a correspondent in the Middle East and North Asia.[3] He is the author of three books. In 2023, Willacy was found to have defamed Heston Russell, a former special forces commander, after making unproven allegations of war crimes.