Open research question
Determine whether any surviving primary Soviet investigative records, witness statements, photographs, or forensic materials remain unpublished, incompletely translated, or absent from widely cited English-language accounts.
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.