About Ensio Koivunen
Lived 1930 – 2003 (aged 72). Ensio Koivunen was a Finnish serial killer.
Ensio Kalevi Koivunen (23 June 1930 – 27 May 2003) was a Finnish serial killer who poisoned three female hitchhikers using carbon monoxide in the summer of 1971, and thereby got the nickname Häkä-Enska ("Carbon monoxide-Enska").
The missing girls On 11 July 1971, 23-year-old Salme Helena Metsänikula (born 28 January 1948) disembarked a bus in Anjala en route from Helsinki to Turku. Koivunen died on 27 May 2003.
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Important facts
Related people
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Contemporaries
People whose lives overlapped Ensio Koivunen's
Frequently asked questions
Who was Ensio Koivunen?
Finnish serial killer (1930-2003)
When was Ensio Koivunen born?
Ensio Koivunen was born on 23 June 1930 in Impilahti.
When did Ensio Koivunen die?
Ensio Koivunen died on 27 May 2003 in Varkaus.
What was Ensio Koivunen's occupation?
Ensio Koivunen was a serial killer.
What nationality was Ensio Koivunen?
Ensio Koivunen was Finnish.
Sources & further reading
Cite this page
APA: Biography.guide. (2026). Ensio Koivunen. https://biography.guide/ensio-koivunen/
MLA: "Ensio Koivunen." Biography.guide, https://biography.guide/ensio-koivunen/.
Chicago: "Ensio Koivunen." Biography.guide. https://biography.guide/ensio-koivunen/.
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