One of the world's top investigators into the illegal ivory and rhino horn trade has been killed.
Esmond Bradley Martin was found in his home with a stab wound in his neck Sunday in Nairobi.
The 75-year-old American was known for undercover work that resulted in exposing ivory traffickers and markets.
Wildlife Direct CEO, Dr. Paula Kahumbu, said Martin's research helped uncover ivory traders in the United States, Congo, Vietnam, Nigeria, Angola, China, and recently Myanmar.
His work was essential in China's decision to stop the illegal rhino horn trade in 1993.
Martin's research also led to China's ending of its legal ivory sales, a ban that went into effect January 1.