Sharon Kinne, AKA La Pistolera, murdered 3 different people using a pistol. Her husband James Kinne, the wife of a lover Patricia Jones, and a random dude she met in Mexico Francisco Paredes Ordoñez.
She escaped from prison in 1969 and has never been seen again.

https://linkt.ree/KillerStories

sources:

https://murderpedia.org/female.K/k/kinne-sharon.htm

https://unsolvedmysteries.fandom.com/wiki/Sharon_Kinne

https://kchistory.org/islandora/object/kchistory%3A75840

https://www.amazon.com/Im-just-ordinary-girl-Sharon/dp/1890622109

https://www.amazon.sg/Serial-Killin-Slut-Story-Sharon/dp/1530674387

Parcast Female Criminals - Sharon Kinne "La Pistolera"