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."
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."