Open research question
Can the complete chain of custody for the original Patterson–Gimlin film be reconstructed from filming through its earliest processing, copying, and public screenings?
A source, research note, or further-reading link closes this question when staff accept it. Evidence and corrections stay attached for staff and do not close it by themselves.
Staff review every contribution before it is added to the file. A correction is a proposal: accepting it does not replace the official record. Rejected items are handled like rejected case submissions.