Here are some options for clues to show that the car was driven by someone other then the owner:

You could indicate that the seat position or mirror alignments were calibrated for a person much taller or shorter then the owner.

If the owner had particular dietary requirements, you could show fast food wrappers contradicting that.

You could even show that the driver was listening to music completely contrary to the owners taste, such as the CD in the player being of a genre they owner hates.
spam fails_task lang_mismatch pii not_appropriate hate_speech sexual_content quality toxicity humor helpfulness creativity violence