When a grave or another memorial site has been changed, the original condition matters. Photographs should show the place, its surroundings, attachments and missing or altered items. Original files and recording times should be preserved.
Cemetery records, burial arrangements, proof of entitlement, invoices for ornaments, messages and video recordings may also explain the sequence. Witnesses should be recorded with their name, contact details and direct perception of the event.
Preserving evidence must not change the site afterwards. A reliable chronology is decisive: who had access and when, what condition was found and which act was personally observed?