Ontario County (N.Y.) District Attorney Michael Tantillo said that Ward was under the influence of marijuana at the time of the crash, which was enough to impair his judgment.
On Sept. 16, Tantillo said he would present evidence from the police investigation of the incident to a grand jury.
Tantillo held a news conference on Wednesday to reveal that findings of the investigation.
According to the Rochester (N.Y.) Democrat & Chronicle, Chuck Hebing, who was driving in the race where Ward was hit, was called to testify about the accident.
Stewart did not participate in the three Sprint Cup Series races after Ward’s death but has raced in the last four.
source: time.com by Sarah Barshop