December 26, 1953 - Margarita Sánchez Gutiérrez

Margarita Sánchez Gutiérrez (born 26 December 1953, in Málaga), also known as the "Black Widow of Barcelona" and "The Black Widow of Hospitalet", is a suspected Spanish serial killer who received her name for her method of murder – by poisoning the food and drinks she offered her victims. She managed to kill four people and poisoned three others who managed to survive.

Content sourced from en.wikipedia.org/wiki/Margarita Sánchez Gutiérrez under CC BY-SA 4.0.