Most prolific murder partnership
Who
Delfina de Jesús Gonzáles, Maria de Jesús Gonzáles
What
90 people
Where
Mexico (Guanajuato)
When
1964
The sisters Delfina and María de Jesús Gonzáles, of Mexico, abducted girls to work in brothels and are known to have murdered at least 90 of their victims. The sisters were sentenced to 40 years imprisonment in 1964