Investigation
The authorities were heavily criticised by the media for dismissing evidence that a serial killer was at work in Mexico City as merely "media sensationalism" as late as the summer of 2005. Soon after setting an investigation in motion, the police incurred further criticism by launching what one journalist described as a "ham-fisted" and unproductive swoop on Mexico City's transvestite prostitutes.
By November 2005, the Mexican authorities were reporting witness statements to the effect that the killer wore women's clothing to gain access to the victim's apartments. In one case a large woman in a red blouse was seen leaving the home of a murdered woman. Two months later, police began checking the fingerprints of bodies in the city's morgues in the apparent belief that Mataviejitas might have committed suicide.
A major breakthrough in the case occurred on 25 January 2006, when a suspect was arrested fleeing from the home of the serial killer's latest victim, Ana MarĂa de los Reyes Alfaro, who lived in the Venustiano Carranza borough of Mexico City. Alfaro, 82, had been strangled with a stethoscope.
To the surprise of many Mexicans, who had supposed the killer to be male, the suspect detained was Juana Barraza, 48, a female wrestler known professionally as The Silent Lady. Witnesses at previous murder scenes had described a masculine-looking woman and police had previously looked for a transvestite although they later admitted that the former wrestler resembled composite images of the suspect. Barraza closely resembled a model of the killer's features, which showed La Mataviejitas with close-cropped hair dyed blonde and a facial mole, and was carrying a stethoscope, pension forms and a card identifying her as a social worker when she was detained.
Mexico City prosecutors said fingerprint evidence linked Barraza to at least 10 murders of the as many as 40 murders attributed to the killer. The wrestler is said to have confessed to murdering Alfaro and three other women, but denied involvement in all other killings. She told reporters she had visited Alfaro's home in search of laundry work.
Read more about this topic: Juana Barraza