Before his sudden death in 2004, this journalist & author was researching the unsolved assassination of P.M. Olof Palme

On the December 23, 2025, episode of Jeopardy, the Final Jeopardy category was “Authors”, and the clue invited contestants to connect a mysterious assassination with a respected investigative writer. The clue read: “Before his sudden death in 2004, this journalist & author was researching the unsolved assassination of P.M. Olof Palme.” This question pointed to a figure known for deep dives into crime and political intrigue, and the correct response was a name well known to readers of true crime and political journalism.

Who is Stieg Larsson?

The correct response to the clue was: Who is Stieg Larsson?

Stieg Larsson was a Swedish journalist and author who gained worldwide fame posthumously for his Millennium trilogy, which began with The Girl with the Dragon Tattoo. However, before achieving literary acclaim, Larsson was a well-established investigative journalist. At the time of his sudden death in 2004, Larsson was actively researching a book about the assassination of Olof Palme, Sweden’s prime minister who was murdered in 1986. Palme’s killing shocked the nation and has remained one of Sweden’s most notorious unsolved cases.

Larsson’s Interest in Olof Palme’s Assassination

Larsson’s interest in Palme’s assassination was not casual. As editor-in-chief of the anti-fascist magazine Expo, Larsson had long been immersed in tracking right-wing extremism and conspiracy networks across Scandinavia and Europe. He believed that far-right movements operating in Sweden during the 1980s had connections to Palme’s death. His unpublished manuscript and notes reportedly explored these links and examined intelligence service activities, neo-Nazi affiliations, and organized crime elements.

Though his research remained incomplete at the time of his death, Larsson’s work has fueled continued interest in alternative theories about Palme’s assassination. Swedish authorities closed the Palme case in 2020, naming Stig Engström, a graphic designer and known critic of Palme, as the likely assassin. However, critics remain skeptical, and Larsson’s notes are often cited by those who question the official findings.

The Sudden Death and Its Lingering Questions

Larsson died of a heart attack at the age of 50 in November 2004, just before the publication of The Girl with the Dragon Tattoo. His sudden death added an air of mystery, particularly given his research into powerful extremist groups. While there is no official indication of foul play, the timing of his death has been the subject of speculation among conspiracy theorists and some journalists.

Despite the lack of a completed manuscript on Palme’s murder, Larsson’s legacy includes both his popular fiction and his persistent investigative work. His archives, still housed in Sweden, have been studied by other journalists and researchers who are interested in the Palme case and Larsson’s political investigations.

Larsson’s Legacy Beyond Fiction

Today, Stieg Larsson is remembered not only as the author of a bestselling crime fiction series but also as a fearless journalist who dedicated his life to exposing hate groups and uncovering political secrets. His Millennium trilogy was published after his death and has since sold tens of millions of copies worldwide, spawning films and television adaptations.

Yet Larsson’s work on the Palme assassination remains a lesser-known but significant part of his legacy. It highlights his deep commitment to uncovering the truth, no matter how controversial or dangerous. For Jeopardy viewers, the December 23 Final Jeopardy clue served as a reminder of a writer whose curiosity and tenacity extended well beyond the pages of fiction.