The case that caught him was for 10-yr old Grace Budd. Six years after killing her, carving her up with a saw and then cooking her body parts in a stew which he ate for nine days, he wrote a letter to Grace’s mother, describing it all in detail. Authorities traced the letter to him and arrested him.
At this trial, it was brought out that Fish associated "cannibalism" with "communion".
Everyone, including the jury, knew he was insane but found him "sane and guilty" and sentenced him to death anyway. His last statement was a handwritten note filled with obscenities. When the press asked to see the statement, Fish's attorney refused, saying, " I will never show it to anyone. It was the most filthy string of obscenities that I have ever read."