Tony Stewart does not know if he will race this weekend at Michigan International Speedway. The Sporting News is reporting a spokesperson for Stewart said via email that the three time champ is still grieving, after being involved in a fatal accident on a dirt track over the weekend.

“The decision to compete in this weekend's NASCAR Sprint Cup Series event at Michigan will be Tony's, and he will have as much time as he needs to make that decision,” SHR spokesman Mike Arning said in the email. “It is still an emotional time for all involved, Tony included.

“He is grieving, and grief doesn't have a timetable.”

Stewart has suspended his participation in dirt track races indefinitely. He was racing in a Sprint Car race in New York on Saturday, when he was involved in an accident with 20-year-old Kevin Ward, Jr. Ward then got out of his car and tried to approach Stewart’s car, when he was hit and killed.

Ontario County Sheriff Philip Povero says the investigation into what happened continues and that they has interviewed Stewart twice. Povero believes there is no evidence that any crime has been committed.