He should have left the result as "undetermined" because he cannot know "accidental" anymore than he can "know" homicide.
Remember, it is an opinion.
However, he should have been more diligent in laying Danny's death drugs side by side with Anna's and brought out WHO prescribed for Danny because as of this date WE STILL DON'T KNOW who Danny was seeing for depression or prescribed his drugs.
At first, yes, probably. But it took him what a month or more to get those autopsy results out. By that time, HKS was already being seen as suspicious. Didn't Perper realize that he could've misread the guy and that maybe he should take a second look. And also by that time, we think, Moe was cooperating with authorities. He could've had a second talk with Moe. But he did none of this. Wouldn't a responsible ME do that. Yes, i said that i don't think Dr. Perp is dumb or naive. Look the guys what 75 years old. He's been around the block. He's a doctor and a lawyer. He must have some logic skills. Unless it's his pride. Otherwise, i can't see why he isn't changing his opinion unless you guys are right and i'm wrong and he really is an idiot. Or maybe he's got something to hide. It's just an idea that may be worth pursuing.