necropsy

Human autopsies are generally performed either to determine the cause of death or to observe the deadly effects of a disease for research or education purposes. Autopsies may be necessary when tracking an epidemic; they're also performed to discover whether a death might actually have resulted from murder, and if so, what evidence it might reveal that could help catch the murderer. Animal necropsies are actually more common than human autopsies, since a farmer with livestock is always concerned that whatever killed one animal not pose a threat to the others.