Episode 10 of 15 | Series 36: Serial Killers in History

Finland's first documented serial killer terrorized two continents across three decades. This episode traces Matti Haapoja's brutal journey from famine-ravaged Finland to Siberian exile and back—a life defined by escape, violence, and ultimately, one final act of defiance.

Victim Humanization

Heikki Impponen was forty-two years old when he walked along that frozen road in December 1867. A farmer with a wife named Kaisa and three children waiting at home, he had known young Matti since childhood—their fathers had worked neighboring fields, they had been boys together in the harsh Finnish countryside. He carried what little money he had, perhaps hoping to buy food during Finland's devastating Great Famine. Maria Jemina Salo was in her early twenties, trying to survive in Helsinki's rougher districts, wearing a silver necklace her mother had given her. Guard Juho Rosted had worked at Kakola Prison for eleven years, with a pregnant wife expecting their fourth child—a daughter who would never know her father.

Why This Case Matters

Matti Haapoja's crimes fundamentally reshaped Finland's approach to criminal justice and prison security. His four successful escapes from Kakola Prison exposed critical weaknesses in the nation's penal system, earning the facility the mocking nickname "Pakola"—the escape prison. His case prompted a complete overhaul of prison architecture and security protocols throughout Finland. The investigation techniques developed to track him helped establish the framework for modern Finnish police procedures, while the case demonstrated how the Great Famine of 1866-1868, which killed 270,000 Finns, created conditions where desperate violence flourished.

Content Warning

This episode contains descriptions of violent murders and suicide. Listener discretion advised.

Key Case Details

Haapoja's criminal career spanned three decades across two continents, leaving eight confirmed victims dead and exposing the limitations of 19th-century criminal justice systems across Finland and Siberia.

• Timeline: First murder December 6, 1867, during Finland's Great Famine; sentenced to Siberian exile in 1880; returned to Finland September 1890; final escape attempt October 10, 1894; death by suicide January 8, 1895

• Investigation: Haapoja's escapes revealed major security flaws in Finnish prisons; his capture after Maria Salo's murder came when his notorious reputation led to his recognition in Porvoo just days after the crime

• Resolution: Sentenced to death in 1891 (automatically commuted to life imprisonment as Finland had abolished capital punishment in 1826); died by his own hand while awaiting trial for murdering Guard Juho Rosted

• Historical Context: The puukkojunkkari (knife-fighter) culture of Southern Ostrobothnia shaped Haapoja's violent identity; his skeleton was displayed in the Finnish Museum of Crime for 99 years before burial in 1995

Historical Context & Sources

This episode draws on records from the National Museum of Finland, the National Biography of Finland, and the BiographySampo database. Prison museum collections preserve the tools of Haapoja's escapes—rope, wooden slats, and a floorboard with a drilled hole. Contemporary newspaper accounts from the 1890s, which sensationally compared his crimes to Jack the Ripper's London murders, provide crucial details about his final trial and death. The Circuit Court records of Hausjärvi from 1891 document his arrogant confession and the commutation of his death sentence.

Resources & Further Reading

For listeners interested in exploring this case and era further, these historically significant sources provide additional context:

• The National Museum of Finland maintains archival materials on 19th-century Finnish criminal justice and the puukkojunkkari phenomenon

• The Finnish National Biography database (Biografiakeskus) contains verified biographical details on Haapoja and his contemporaries

• Academic research on the Great Famine of 1866-1868 illuminates the devastating conditions that shaped Haapoja's early crimes

Call-to-Action

Next week on Foul Play: Francisco Guerrero Pérez terrorized Mexico City for decades, targeting women the newspapers refused to mourn. Subscribe now to follow Season 36: Serial Killers in History to its conclusion.

Support this podcast at — https://redcircle.com/foul-play-crime-series/donations

Advertising Inquiries: https://redcircle.com/brands

Privacy & Opt-Out: https://redcircle.com/privacy