On the evening of February 28, 1986, Swedish Prime Minister Olof Palme was fatally shot on Sveavägen street in central Stockholm as he walked home from a cinema with his wife, Lisbeth. He died at Sabbatsberg Hospital less than an hour later. The assassination triggered what would become the world's largest murder investigation—yet 34 years on, no one has been convicted.

Now, Swedish broadcaster Kanal 5 has released *Palmemordet: Den stora mörkläggningen* ("The Palme Murder: The Great Cover-Up"), a four-episode documentary series that reopens the case through the eyes of investigator Jan Stocklassa. Directed by Matt Rudge and produced by David Batty and Rebecca Hayman, the series premiered on May 24, 2023, and is available on platforms including Apple TV and Plex.

The documentary is based on Stocklassa's research into the private archives of Stieg Larsson, the late Swedish journalist and author best known for *The Girl with the Dragon Tattoo*. Larsson spent years investigating the Palme case before his death in 2004. Stocklassa's book *Stieg Larsson's Archive - The Key to the Palme Murder* formed the foundation for the series, which has been translated into 27 languages, signaling international interest in the case.

At the heart of the series is Stocklassa's central claim: "The theory that Stieg Larsson was convinced about has not been investigated to the bottom." Rather than accepting official conclusions, the documentary explores what Stocklassa contends are uninvestigated leads and potential police cover-up.

The investigation's most significant recent development came in June 2020, when prosecutor Krister Petersson named Stig Engström—a graphic designer nicknamed "Skandia Man" for his workplace near the crime scene—as the prime suspect. Engström, born February 26, 1934, claimed to have arrived at the scene shortly after the shots were fired. However, the case against him was built on circumstantial evidence, and without direct proof, the investigation was suspended following his death on June 26, 2000.

In a dramatic reversal, chief prosecutor Lennart Guné cleared Engström in December 2025, concluding that no murder conviction could be established against him.

The crime itself has remained etched in Swedish memory: Palme and his wife had taken the subway from Gamla stan to Rådmansgatan station before walking home unguarded—an unusual decision that gave the assassin an opportunity. The attacker fired twice, killing Palme with a shot to the back and wounding his wife. The shooter then fled east on Tunnelgatan, disappearing into the night.

What makes *Palmemordet: Den stora mörkläggningen* significant is its willingness to question the official narrative. The series doesn't simply rehash well-known facts; instead, it presents Stocklassa as an active investigator, examining Larsson's private notes and asking whether institutional failures or deliberate obstruction prevented the truth from emerging. For international audiences, this approach offers a window into both a specific historical crime and broader questions about transparency, accountability, and the limits of official investigations.

The documentary arrives at a moment when cold cases around the world are being revisited through documentary media. Like similar series examining unsolved murders, it combines archival material, interviews, and investigative journalism to challenge assumptions about what is known and unknown.

Whether the series presents conclusive new evidence or primarily raises questions remains a point of discussion among Swedish crime observers. What is clear is that the Palme assassination continues to fascinate and frustrate—a reminder that even the most exhaustively investigated crimes can resist definitive resolution.

**Sources**

https://press.warnerbrosdiscovery.se/post/palmemordet-den-stora-morklaggningen-ny-dokumentarserie-pa-kanal

https://www.youtube.com/watch?v=eN9WQRNz-vE

https://tv.apple.com/se/show/palmemordet---den-stora-morklaggningen/umc.cmc.407oie2ufy3kv55wl8shvjx6r

https://watch.plex.tv/show/palmemordet-den-stora-morklaggningen-1

https://en.wikipedia.org/wiki/Assassination_of_Olof_Palme