A 55-year-old man who was shoved at a Hank Williams, Jr. show died on Tuesday, Aug. 19, from his injuries.

Robert Kobe was at Williams' show on Sunday, Aug. 17, at the DTE Energy Music Theatre near Clarkston, Mich., when a 15-year-old shoved him, causing a serious head injury.

Kobe's son, Cory Kobe, says that the incident appeared to be an accident. The elder Kobe was at the concert with a friend and his 15-year-old son. Cory says that his father was known to enjoy horseplay.

“I want to make sure that this young man gets fair treatment,” his son says. “There are a lot of indications that there was no malicious intent ... Did you ever have an uncle who picks on you but doesn’t mean to hurt you? That was my father. My father was double this kid’s size. There’s no way that kid’s just going to come up and clock my dad."

The Oakland County Prosecutor's Office says that the investigation is ongoing.