Question: What, and whom, can be the subject of a  forensic artist who works for the government, finding missing people? 

Answer: The subject of an artist is the person or thing that poses for the drawing.  Mona Lisa was "the subject" of Da Vinci's masterpiece.   The "subject of a forensic artist" could be the following (and I'm sure there are more):\nA missing person where a picture of when they were young existed and the artist had to draw them as they would look today (age them)...\nA missing person who authorities believe may have changed their appearance...\nA dead person whose idenity is unknown so they need to get it out to the media, etc.,\nOr a crime scene.
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