Having previously been part of a family whose older uncle was the "dodgy sheriff" of a county in Iowa, I'll take a stab at how this works.
Your brother has an accident with his tractor and is killed. Some time later a car pulls into a field with a couple on board looking for a spot for some "liaison". The couple spot the overturned tractor in the field and drive up to see what's going on. They find your brother, and giving them the benefit of the doubt, I'll say they find he has passed.
Trouble is this "couple" shouldn't be. They are either married to other people, or underage, or any number of other circumstances that would outrage the locals and frighten the horses in rural Kentucky. They go to the sheriff, on the strict understanding that their names are kept out of any public discussion. However, the sheriff is in a bit of a bind because he really has to document what he knows.
So, the sheriff goes to the local judge, explains that a full reveal is just going to create unnecessary grief locally. He asks that the judge agree that the report can only be released by a local judge's order...which of course will never happen.
There you have it. Good luck getting the court order. Before possibly wasting your money, I'd suggest checking on all the family names of the local judges and law enforcement and see how many align from 1971 to today.