Question

forensic odontology would not be useful for ______.
identification of individuals buried in a mass grave discovered after a war
identification of victims found after a huge house fire
identification of a perpetrator who left behind his car keys
identification of victims of the 9/11 attacks on the twin towers

Explanation:

Forensic odontology uses teeth for identification. In mass graves (after a war), house fires, and 9/11 (where teeth may be relatively intact compared to other body parts), teeth can be used. But car keys have no relation to teeth for identification.

Answer:

Identification of a perpetrator who left behind his car keys.