He was not dead. He was on life support at the hospital.

People are killed on horses all the time.

I know it makes your life more exciting to think the insidious and ever-reaching tentaciles of the mob are all around us, but they're not.

A coroner would easily be able to tell the difference between someone who was killed in a horse accident and one who was hit with a hammer, had his neck broken, etc.

The reason there hasn't been a lot of "looking into it" is because there is no controversy.