A rare form of serial killer are Black Widows - women who kill their spouses and other family members - usually for financial gain.  Even more rare are Black Widow Sisters.  This week I'll share two stories of sisters who set up murder syndicates for profit.   www.patreon.com/onceuponacrime  Resources: Angela Brabin, The Black Widows of Liverpool: A Chilling Account of Cold-Blooded Murder in Victorian Liverpool. Lancaster:Palatine Books, 2003.  Marcos Aleman, Chicago Tribune, "He pays to get married and emigrate to the US, then they kill him to collect the insurance," March 31, 2017. 

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