In his final NASCAR win before his shocking death, Kyle Busch left fans with a chilling comment that now has many questioning.

NASCAR star Kyle Busch’s cause of death was revealed Saturday as severe pneumonia that progressed into sepsis, according to a statement released by his family.

Ahead of Sunday’s race at Charlotte Motor Speedway, the three, along with Busch’s brother, Kurt, and parents Tom and Gaye, joined the NASCAR community for a pre-race ceremony to honor Busch.