Esmond Bradley-Martin's research was instrumental in China's decision to ban its legal rhino horn trade in 1993. It also pressured China to end legal ivory sales, a ban that came into force on Jan 1. Photo: Save the Rhino via The Telegraph

Top ivory investigator found dead in Kenya

Ex-UN envoy for rhino conversation Esmond Bradley-Martin found dead in Nairobi home with a stab wound in neck