Who is Philip from Stories: All-New Tales and what is their importance?

Philip is a young man who in 1938 finds a knife after an altercation with the head prefect of the house he lives in. Stafford has turned Philip into his principle victim, and after the first beating occurs, Philip is in no hurry to have it repeated. He takes the knife he found and later that night, he uses it to end Stafford's life. Philip is never caught, but many years later he confesses the truth to his godfather who advises him to keep his secret and assures him he will not tell a soul.