body snatcher

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A person who steals corpses from graves and sells them, usually for purposes of dissection.
• noun Slang A corporate recruiter.

from The Century Dictionary.

• noun One who secretly disinters the bodies of the dead as subjects for dissection, or for the purpose of exacting a ransom; a resurrectionist.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun One who secretly removes without right or authority a dead body from a grave, vault, etc.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun someone who takes bodies from graves and sells them for anatomical dissection