DNA fingerprinting convicts Zimbabwe lion poachers in landmark case

Source: DNA fingerprinting convicts Zimbabwe lion poachers in landmark case

A pack of lions in Botswana. Image by Diego Delso via Wikimedia Commons (CC BY-SA 4.0).

• Prosecutors in Zimbabwe used lion DNA forensics for the first time to successfully convict two people for poaching and trafficking a male lion near Hwange National Park.
• Investigators analyzed DNA from confiscated lion parts and were able to match it to a radio-collared lion in their database that was killed in 2024.
• Proving that the seized parts came from a poached wild lion provided the evidence that sent the two poachers to prison for two years.
• Experts say DNA forensics provide invaluable proof in hard-to-prosecute wildlife crimes, and this recent conviction sets a precedent for bringing poachers to justice in court using the forensic technology.

A CSI-style investigation in Zimbabwe helped to successfully prosecute two people for killing a lion and trafficking its teeth, flesh and other body parts in February. Forensic specialists analyzed DNA collected from parts seized by authorities and matched it with a radio-collared lion that was killed two years ago. This conviction was historic: It’s the world’s first case to use a lion’s genetic material and trace it back to an individual to pin down wildlife criminals. The two defendants were sentenced to two years in prison for their crimes.

The conviction is tied to a 2024 case in which poachers snared and killed a male lion near Hwange National Park, close to the world-famous Victoria Falls. Researchers knew this particular lion, as they’d tracked its movements as part of a study. When they captured and anesthetized the cat to fit it with a radio collar some years ago, biologists took blood samples and logged its genetic and health information into their database.

Investigators used that DNA data to trace the origins of seized lion parts, which included three bags of meat, 16 claws and four teeth that were to be sold on the black market. Parts from captive-bred lions can be traded internationally and in Zimbabwe with the appropriate paperwork, but the sellers didn’t have permits, and proving these seized parts came from a wild lion and not a captive-bred one was key to this case. That would mean poaching, which is  illegal.

“This breakthrough represents more than scientific achievement; it embodies our determination to protect biodiversity for future generations to come,” Zimbabwe-based nonprofit Victoria Falls Wildlife Trust wrote in a statement.

Scientists from that organization, with support from the U.K.-based NGOs TRAFFIC and TRACE, conducted the genetic analysis to generate a full DNA profile from the lion parts and match it with the slain lion’s genetic material.

DNA forensics first came into use in criminal investigations in 1985, after British geneticist Alec Jeffreys discovered that genetic patterns could effectively identify individuals, a process he dubbed “DNA fingerprinting.”

The process has been used for decades to identify trafficked wildlife, but recent developments in genetic analysis and growing databases have helped researchers trace samples to specific individuals. DNA evidence has since been used to convict wildlife poachers, but this is the first instance of a lion’s DNA being used to nab its killers.

Wildlife poaching and trafficking cases are often difficult to prosecute because often rely on circumstantial evidence. In Zimbabwe, where the trade in captive-bred lion parts is permitted with necessary paperwork, prosecutors face the added complication of having to prove that parts came from a wild lion.

Without convincing evidence, making successful convictions in wildlife-related crimes are challenging and rare. But the recent case shows DNA forensics is beginning to change that.

“DNA has revolutionized how we present evidence in court, because the sequencing can go right down to the individual in most cases,” said Sheldon Jordan, who has worked with Canada’s wildlife enforcement agency but wasn’t involved in this conviction. “I don’t think we could regulate trade as well as we do without being able to fall back on DNA analysis for evidentiary purposes.”

Lions are the most-traded wildcats in the world. Although African lions can be traded internationally with permits, they’re also heavily poached across the continent, driven by demand for their body parts that are used in traditional medicine as well as cultural practices in Asia and Africa.

Tigers have been in the crosshairs for four decades, targeted for their bones. China and Southeast Asian countries are cracking down on trafficked tiger bones, which are used in tiger bone wine, an exorbitantly expensive elixir used as traditional medicine and served as a way to flaunt prestige and power. The bones of other big cats, including lions, sometimes replace them. Lion parts are also widely used within Africa for medicines, rituals and as talismans.

Poaching poses an “existential threat” to African lions, a 2026 study found: fewer than 25,000 wild lions remain across the continent, an order of magnitude less than the roughly 200,000 found there a century ago.

In Zimbabwe, poaching is an ongoing threat. Two lions were poached there last year, according to TRAFFIC’s Wildlife Trade Portal data. Beyond the loss of individual lions, killing a male that heads a pride often spells doom for its cubs: When a new male takes over, he often kills off the former leader’s progeny.

Now, another lion case is in court in South Africa, with prosecutors again using DNA fingerprinting as evidence. The recent conviction in neighboring Zimbabwe “sets an important precedent for how science can support enforcement” in the future, according to Markus Burgener, a wildlife trade expert with TRAFFIC, focusing on Southern Africa. It can help bring criminals to justice, he said.

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