Remember the Augustine case in Las Vegas this past summer? It was a case of going back due to more police evidence and looking for something not normally found in autopsy... they did and found what the police were looking for.
What I'm trying to say-and not very well---is that the ME will not change their findings, just because the police want him to.
When I heard the interview with Perper today on FOX, he said that he was probably not going to change his findings. He said it was possible, but unlikely.