Random thought: There are stories of ancient cultures performing forms of human sacrifice wherein someone is buried alive in the construction of a building for some reason...

But in modern history, construction accidents leading to fatalities are a known phenomenon including cases where someone will fall into like the foundation of a building or the concrete pillar supporting a bridge and it's just not feasible to retrieve the body so they get left in there.

So... how many of those alleged sacrifices were actually construction accidents?