A vehicle used in the commission of a felony may be entered into which one of the following files if its whereabouts are unknown?

A vehicle used in the commission of a felony can be entered into the Vehicle File when its whereabouts are unknown because this file is specifically designed to track vehicles involved in criminal activities, including felonies. It provides a system for law enforcement to manage and locate vehicles connected to crimes, whether they are stolen, abandoned, or simply missing after being used in a felony. By entering the vehicle's details into this file, law enforcement agencies can ensure that relevant information is shared across jurisdictions, aiding in the recovery of the vehicle and the apprehension of any suspects involved in the crime.

The other files mentioned serve different purposes, such as tracking stolen property or documenting evidence from crime scenes, but the Vehicle File is the most appropriate choice for vehicles specifically involved in crimes.