The Arizona Department of Public Safety also said that 39-year-old Stephen Martin said after the Tuesday morning accident that he knew he was drunk and shouldn't be driving.
According to DPS, a woman in Martin's SUV said they couldn't find a place to turn around on Interstate 17.
DPS said he had a blood-alcohol level of .313. The legal limit is .08.
Martin remained jailed on suspicion of second-degree murder and other crimes.
When Martin appeared in court Wednesday, defense attorney Vicki Lopez said the case resulted from an "unintentional act."
Copyright 2015 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.