During the research, a team led by Dr Hamish Campbell, from the University of Queensland, captured 20 crocodiles living in the North Kennedy tidal river in Queensland, northern Australia, and tagged them with satellite transmitters.

BBC: Crocodiles 'surf' long distance on ocean currents

His last movements captured on CCTV showed him staggering down a dead end lane leading to wasteland and the river.

BBC: Ben Thompson

Naw Kham was eventually captured and extradited to China to stand trial for the killings of 13 Chinese crewmen on Mekong River in 2011.

BBC: China media: Hacking denial