Ask HN: Seeking an account of a self-professed philosophical zombie

I've been struggling to find a particular article that I remember reading several years ago on HN. Its subject was a man who claimed to have lost his inner life after either witnessing or inadvertently causing another person's death.

If my memory serves, the subject was a priest or minister living in the 19th century. There were no outward signs of his reported affliction and he was capable of communication (i.e. he was not in a coma or otherwise visibly impaired). I believe the subject even remarked upon the apparent paradox of being able to report the absence of an inner life.

I'd be grateful if any of you can help me find it. All of my search engine queries were fruitless.