Bolivian Mennonite gas-facilitated rapes
The Bolivian Mennonite gas-facilitated rapes were mass serial rapes by a group of men over at least four years in the Bolivian Mennonite settlement of Manitoba Colony in Bolivia. At least nine male members of the colony sprayed a veterinary sedative through window screens to render whole households unconscious.
Source: Wikipedia — Bolivian Mennonite gas-facilitated rapes (CC BY-SA 4.0)