All of this reminds me of the 'mass graves' of native children allegedly discovered in Canada at what were called residential schools.
The acuity of the radar scans were said to be so precise as to conclude that the bodies in the 'mass graves' were children. They even put forward body counts.
At one of the schools they had identified several 'grave' sites. Well over a dozen if my memory is accurate.
Then in a surprising move they actually took the step of excavating.
The result? Nothing, no bodies of children that decades later natives suddenly realized were missing, as if they just recently came out of a state of mass amnesia.
But that doesn't stop it from being an industry, they have enormous sums of money from government compensation, they have foundations, ceremonies and vigils etc., including putting on displays of shoes and other items to represent the children that aren't in the 'mass graves'.
I'm fairly certain that if there was a widely distributed radar scan known to be associated with a yet to be excavated site at one of the residential schools, AI could be programmed to affirm the existence of a mass grave or to suggest that there are very suspect anomalies.
Q: And what would the 'deniers' say?
A: Excavate it.
Oh and btw, former students who are interviewed and who offer their personal testimonies are referred to as survivors. They survived school.