Could it not be that these people (like others elsewhere) have a folk tradition about "little people"? Could the tradition have its roots in a prior encounter with fossils of this hominid?
Hardly enough to surpass reasonable doubt, I think.
Their point is people get convicted on "not a shred of physical evidence", but plenty of eyewitnesses. Why are the rules for punishing someone so much more lax than the rules for whether or not something can exist?