This is a whodunit with a real twist - all the characters are animals. In this wildlife murder mystery David Attenborough investigates the strange death of a green turtle. The victim's body is found on abeautiful beach in Costa Rica, but this is no paradise.There are killers on the loose - on the land lurk fearsome crocodiles and elusive big cats and the sea conceals prime suspects too - sharks, swordfish and poisonous jellyfish. CCTV surveillance cameras reveal the final piece in the jigsaw but will you be able to spot the clues, follow the trail and guess the identity of the turtle killer?