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."

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).