National Wildlife Forensics Lab

Examples of evidence items that are sent to us for examination:

blood samples (ideally, in a fresh or dried condition)
tissue samples (same as above, only include frozen)
whole carcasses (same as the above, except we're rarely that lucky)
bones
teeth
claws
talons
tusks
hair
hides
furs
feathers
leather goods (purses, shoes, boots...)
poisons
pesticides
stomach contents (uh huh)
projectiles (bullets, arrows...)
weapons (rifles, bows, traps....)
Asian medicinals (rhino horn pills, tiger bone juice...)
And pretty much anything else you might imagine that could have come from (or been made from) an animal.