La Dama del Silencio
Juana Barraza was a serial killer in Mexico City. She'd pretend to be a social worker to gain entry to homes, choke out the victim with an object, and steal from their houses after their death. Barraza was a minor indepedent wrestlers as “La Dama del Silencio” (The Lady of the silence) and wrestled as a ruda. Barraza's murders had nothing to do with lucha libre and she was no longer wrestling when she was caught, but she's often portrayed as a murdering wrestler.
Barraza was arrested on January 25, 2006 for the murder of Ana María de los Reyes Alfaro, a 89 year old woman, and was subsequently connected to murdering 10 other women. The nickname "La Mataviejitas" (The Older Women's Murderer) was how the police referred to Juana Barraza, before they caught her. It's not a name she used in the wring.