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.

#BlackWidowsofLiverpool #BlackWidowsofElSalvador #serialkillers

www.patreon.com/onceuponacrime

Several resources were used in the research for this episode including:

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.