I doubt it - that's pretty far-fetched, if you're suggesting that the ME did it because of the book. There's no evidence whatsoever to suggest that the coroner isn't an upstanding man.
Regardless, Fuhrman's book got a couple extra weeks on the shelves, and is now and forever out of date. Don't think that's a very good tradeoff for him.
But that matters not to the people that will buy it regardless of what the ME said because they're minds are already made up. Peoople that buy that book are only looking for more "evidence" that they were "right" all along. No significant number of people that supported Michael will buy that book. They never were Fuhrman's target market anyway.
Fuhrman's book on TS has taken a dive?