French authorities have resolved a decade-long series of assaults and rapes known as the "Predator of the Woods" case by using genetic genealogy, a forensic technique that matches DNA from crime scenes with relatives listed in recreational genetic databases. The attacks occurred between 1998 and 2008 in the La Rochelle and Paris areas, where the perpetrator targeted victims on the street, sometimes convincing them to enter his vehicle before driving them to secluded wooded locations to commit the crimes.
The breakthrough came in 2022 after the FBI provided a key lead identifying a distant relative of the suspect, Matthieu Bouvet. Bouvet had voluntarily submitted his DNA to a genealogy database, despite French regulations that generally prohibit such personal genetic testing. French investigators used Bouvet’s detailed family tree and sifted through thousands of relatives, cross-referencing characteristics such as age, height, and eye color to narrow down potential suspects.
This investigative process ultimately led to Bruno Llambrich Gonzalvo, then 62 years old, who was arrested in December 2022. DNA evidence from the crime scenes matched Gonzalvo’s genetic profile, and he subsequently confessed to the offenses. It emerged that Gonzalvo had a previous conviction for sexual assault dating back to the 1980s but had not attempted to evade law enforcement. Notably, he even ran for local political office. Gonzalvo died by suicide while in custody in March 2024.
The case underscores a growing legal and ethical debate in Europe regarding the use of genetic genealogy in criminal investigations. France is currently considering legislation that would formally authorize law enforcement to employ genetic genealogy techniques, but concerns about privacy and data protection remain prominent.
Similar controversies are evident in Germany, where authorities have resisted the use of genetic genealogy to solve cold cases. A notable example involves the unresolved 1990 murder of Cornelia Pfau. Her daughter and a coalition of cold-case activists have urged German officials to reopen the investigation utilizing genetic genealogy methods, despite government reluctance rooted in privacy concerns.
The developments in France and Germany illustrate the balancing act European governments face in leveraging new forensic technologies while upholding stringent data privacy laws. As the debate continues, the future role of genetic genealogy in solving cold cases remains uncertain across the continent.