Overview
- Johnson collapsed late in a heavyweight Thai bout at the Matador Fighter Challenge at Cicero Stadium.
- On-site medical staff treated him, and an ambulance was called at 8:38 p.m. to transport him to Loyola University Medical Center.
- He was pronounced dead at 12:01 a.m., according to the Cook County Medical Examiner's Office.
- Cicero police are conducting a death investigation as officials await the medical examiner's determination of manner and cause of death.
- Event materials listed him for a heavyweight Thai fight, with the promotion's website naming Corey Newell as his scheduled opponent, according to reports.