In the news

Another piece of helpful technology is DNA profiling. DNA tests on seized rhino horn, and comparison to a database of known rhino DNA, can identify where the rhino horn has come from. It provides vital evidence linking criminals to the crime scene and helps secure convictions.

http://blogs.wwf.org.uk/blog/campaigns/day-5-how-technology-is-helping-to-combat-rhino-poaching/

Could be used by the baddies too.