Onni Poikonen
Occupation Caretaker

September 21, 1930
Karstula, Finland

Cause of death Suicide
Spouse(s) Saima Poikonen
Attack information
Date September 20/21, 1930
Location(s) Karstula, Finland
Target(s) Family
Killed 6
Weapon(s) Hard instrument

Onni Poikonen was a Finnish caretaker who killed his wife and five children in Karstula, Finland during the night from September 20 to September 21, 1930.[1][2][3][4][5]

Poikonen, who worked as caretaker of the defence barracks, was said to have been neurotic in the days leading up to the murders and had uttered threats against his wife Saima.

That night he killed his wife and children, the youngest of which was 2 weeks old, in the bedroom by battering their heads with a hard instrument, set the house on fire at around 2:45 a.m., and then committed suicide by drinking Lysol.[6][7][8][9][10]


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