I don't have an excuse why their lawyer did the lawyery stuff, but as far as unlinking of the file being done in software, "destroying evidence", I think the explanation is far more benign.
If you're big on privacy, things like logging incorrect password attempts is a big no-no. We have to "thank" the privacy advocates for that.
How do you think the owner of the car would feel if the file was visible in plain sight to the next owner of the vehicle?