The death of a 55-year-old man following a recent Hank Williams, Jr. concert has been ruled a homicide by the Oakland County medical examiner's office.

An apparent confrontation between the man, Robert Kobe, and a teenager at the country singer's recent Michigan concert led to Kobe being shoved by the 15-year-old, hitting his head on the concrete. Witnesses and bystanders held the teen until cops could arrive at the scene, while Kobe laid in a puddle of his own blood.

He later died. While the sheriff's department has not yet finished their investigation, they hope to do so by the end of the week, Detroit Free Press reports. The teenager was released until the investigation is complete. It has not been determined if the boy will face charges as an adult or juvenile.

The teenager was at the show with his father, who was a friend of Kobe's. Kobe's own son spoke out following the tragic incident, saying he believes it was an accident and that his father could have actually provoked the attack.