October 25, 1936 - Arnfinn Nesset
His position of institutional authority — as both nurse and nursing home manager — gave him sustained, unsupervised access to the most vulnerable patients over an extended period. The scale of his confirmed killings, at least 22, made him one of Norway's most prolific convicted killers, and his case raised lasting questions about oversight within care facilities.
From Wikipedia
Arnfinn Nesset (25 October 1936 – 2 December 2025) was a Norwegian nurse and nursing home manager who was a convicted serial killer. His crimes include the murders of at least 22 people, as well as attempted murder, document forgery, and embezzlement. He may have murdered up to 138 people. In 1983, he was convicted of poisoning 22 patients and sentenced to 21 years in prison. He served 12 years and 10 years of supervision and was thought to be living under an assumed name.
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