Event reconstruction can be an enormous undertaking – consider the millions spent by producers on costuming and sets for films and theatrical productions; the years of research and interviewing done by the authors of biographies and history books.

Still, a new sort of reconstruction is on the rise now –virtual reality, for which users don goggles to view storyworlds developed by videographers, directors, programmers and sometimes researchers and historians.

Archaeology is like a protracted police investigation, wherein your evidence is precious because it is sparing and you’re lucky if you have a lot of witnesses.

Caroline Sturdy Colls, an associate professor of Forensic Archaeology and Genocide Investigation at Staffordshire and founder of their Centre of Archaeology, knows this with certainty, having long worked in both the fields of genocide research and homicide investigation.