I’m researching how early P2P platforms actually functioned and have a technical question.

There is a common claim that during the early 2000s, especially with Napster, someone could accidentally download illegal non audio files because they were mislabeled as popular songs.

From a digital forensics standpoint, I’d like to understand:

Did Napster even support the transfer of non audio file types, or was it strictly MP3 based?

Could mislabeled files realistically result in a user unknowingly possessing illegal content?

In an investigation, what forensic indicators would distinguish accidental downloads from intentional searching, saving, or sharing?

Are you aware of any documented cases where a person faced serious consequences due to a genuinely accidental download from Napster or similar networks?

This is not related to a specific case, just a technical inquiry into how P2P systems worked and how intent is evaluated in forensic analysis.