The thing I never got is why Boris Karloff didn't explain the Grinch's eyes changing color. That seems kind of worrisome from a medical perspective.

Seconded. There was an accusation that some of Amanda Knox's DNA was on a bra strap/clasp of Kercher's, but I believe that turned out to be contamination by police picking up the bra with dirtied gloves. As you said, the incompetent police force completely botched the whole investigation.

Yes, they senselessly murdered a pregnant lady. But the whole episode was so well done. And since you haven't read the books, welcome to the Hopeless World of Westeros that the rest of us have been living in for years!