His 2013 book JFK: The Smoking Gun, based on his theory about the assassination of U.S. president John F. Kennedy, was made into an award-winning documentary film.
[3] McLaren's third book, Sunflower, is a historical work depicting the experiences of his grandfather, one of Australia's longest-serving foot soldiers in the First World War.
[8] McLaren's investigation was a continuation of Bonar Menninger's earlier book about Donahue's theory, Mortal Error: The Shot That Killed JFK.
[8] From 2016 to 2018, McLaren researched the case of the murder of Bob Chappell in Hobart, Tasmania, where Susan Neill-Fraser was convicted of killing her de facto husband on their yacht.
For two years, McLaren spoke to hundreds of people, witnesses and police and produced a book called Southern Justice, to be released in 2019.
[9][10] McLaren's police career has been the focus of various television documentaries and the Underbelly Files: Infiltration telemovie series screened on Channel 9.
McLaren also contributed to Killing Time, the television mini-series based on once corrupt lawyer Andrew Fraser's life, produced by Fremantle Media, TV1 and Film Victoria.
He was also a key expert on a US television show on assassinations called Inside the Evidence which was headed by American anchorman Bill Kurtis.
The documentary aired on Australian and American television,[16][17][18] Directed by Malcolm McDonald,[19] it features re-enactments, archival footage, and also new interviews with witnesses to the shooting.
[citation needed] A one-hour abridged version of this documentary aired in the United Kingdom, entitled JFK's Secret Killer: The Evidence.
McLaren interviewed many of those involved in the investigation, French police and paparazzi included, as well as crucial witnesses, and concluded that a cover-up existed.
Each episode examines a notorious mobster who murdered his way to the top, to take control of a New York City Mafia family, before they themselves met death or lengthy jail terms.
[32][33] Throughout 2020-2022 McLaren was a key witness in a Supreme Court trial against the mafia boss Domenic Perre for bombing the National Crime Authority office in Australia.