1911: On 11 January, Takács Rozália succeeded in murdering her husband, Takács Lajos. It wasn’t from want of trying; she had already made several attempts. According to his wife, Lajos was a good-for-nothing “alcoholic beast” who regularly mistreated her. His death was the first of a string of murders in the Hungarian village of Nagyrév. The killings were the work not of individuals acting in isolation, but of groups of villagers sharing their murderous expertise. Almost all of the murderers and their accomplices were women. Their victims – four-fifths of them – were men: abusive husbands, unfaithful lovers, elderly and frail fathers-in-law. The preferred means of murder was poisoning with arsenic, which was easily dissolved out of flypapers. Between 1911 and 1929, when the authorities eventually cottoned on that something was amiss, forty or more villagers were poisoned.
Source: Béla Bodó, Tiszazug: A Social History of a Murder Epidemic (2002), chap. 5