I've read it and besides the "why", I'm also wondering about the long-term impact on the person who was hit (Buford's father).

I believe I've located a news article which gives a brief description of the altercation, at https://archive.is/utJqE

It says that his mother told police that "her son hit her husband after the couple confronted him about being involved in a robbery. She told police her son had property in his room that they believed may have come from the robbery."