http://espn.go.com/racing/nascar/story/_/id/11347015/tony-stewart-actions-questioned-father-killed-driver-kevin-ward-jr

SYRACUSE, N.Y. -- The father of the driver run over and killed by Tony Stewart told The Syracuse Post-Standard that "there's no reason for" the crash that led to his son's death.

Kevin Ward Jr. was sent into the wall when his car was bumped by Stewart's in a dirt-track race on Saturday night at Canandaigua Motorsports Park. Ward got out of his car and walked onto the track, where he was hit by Stewart's car.

Kevin Ward Sr. tells the newspaper that "Tony Stewart was the best damn driver by far on the track that night. Why he had to go up as high as he did and hog my son, there's no reason for it."

When the 20-year-old Ward got out of his damaged car, he walked on the track and appeared to point at Stewart. Other cars drove past him, but Stewart's right-rear tire appeared to hit him and drag him along the track.

"Apparently, Tony Stewart was the only one driving out there who didn't see him," Ward told the newspaper.

Ontario County sheriff Philip C. Povero said in a statement Tuesday that the investigation into Ward's death is expected to continue for at least another two weeks, if not longer.

No charges have been filed against Stewart, but they are still possible.

Ward Sr. also addressed that in his interview with the newspaper, saying: "The one person that knows what happened that night is possibly facing 10 years in prison. Is he going to say what he done?"

Racing at Canandaigua is expected to resume Saturday.