A BBC investigation exposing the scale of chimpanzee trafficking last year has helped police in Nepal uncover a smuggling operation, as Sam Piranty in Kathmandu reports.
Even to a hardened detective the discovery was shocking: two baby chimpanzees, exhausted and hungry, and sucking their thumbs.
The tiny animals had been captured in the wild in Nigeria and then flown thousands of miles to Nepal.
"They were just like small babies," says the Nepalese police officer in charge, Anupam Rana.
Drugged and hidden inside a packing case, they were victims of a network of wildlife traffickers spanning half a dozen countries.
Although chimps are endangered, the babies are wanted as pets and these two were on the black market for $12,500 each (nearly £9,500).
This is one of many examples of an illegal trade worth billions of dollars every year that is being discussed at a major conference on wildlife trafficking this week in London.
The chimps were rescued in the Nepalese capital, Kathmandu, after officers saw coverage of a BBC News investigation last year that exposed the horrific scale of chimpanzee smuggling.