Juana Barraza, born on December 27, 1970, in Mexico City, was a professional wrestler who gained notoriety for her performances as 'La Mataviejitas'. Revered in the wrestling community, she became a household name, but her life took a dark turn as she emerged as a suspect in a string of murders targeting elderly women. The investigation into her activities began to unfold in the early 2000s when a disturbing pattern of violence against elderly women was detected. These victims often lived alone and were found brutally murdered in their homes.

The police pieced together evidence that led them to Barraza, connecting her to the murders through witness reports and forensic evidence, particularly DNA samples collected from the crime scenes. Following her arrest, investigators discovered that Barraza had been motivated by a complex mixture of personal history, financial struggles, and possibly a desire for notoriety. During her trial, many details of her upbringing were revealed, shedding light on her troubled life.

The case of Juana Barraza highlighted significant issues within Mexican society, particularly concerning the safety of elderly individuals and violence against women. It prompted discussions on law enforcement's focus and the need for improved protective measures for at-risk populations. Barraza was ultimately convicted of murder and sentenced to 759 years in prison, solidifying her status as one of Mexico’s most notorious criminals.