Updated

A medical examiner has determined the death of a Missouri man in an Arrowhead Stadium parking lot during a Kansas City Chiefs game was a homicide.

The Jackson County medical examiner announced his ruling Wednesday.

But Kansas City police say the cause of 30-year-old Kyle Van Winkle's death Sunday has not been determined. Van Winkle was found unconscious at 5:20 p.m.

Police spokesman Darin Snapp says detectives have been treating the case as a homicide from the beginning, so the investigation won't change.

Van Winkle had gone to Sunday's game in a vehicle similar to the Jeep in which he was found by the owner. Police say he was involved in a fight, but it's not clear whether that contributed to his death.