Nice of you to define the terms of reference SASless. I can only presume that when you said “There is some reason to accept the local prosecutor moved forward with charges as it had been done“ this was based on something more substantial than blind faith, acceptance or indeed speculation.
Manslaughter charges for causing the deaths of a crew have been brought before the NTSB have said a dickie - and as the NTSB is the competent authority on aviation accidents and their causes, maybe its right to question what the local prosecutor thinks they are doing?