The crash report says Lambert tested at a .232 level of alcohol, which is almost three times the legal limit for driving.
No charges have been filed.
“We are still investigating, it will have to be presented to a grand jury,” Champaign County Sheriff Matthew Melvin said.
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Hess was wearing her seat belt at the time of the crash, according to the report. She was pronounced dead at the scene.
Lambert didn’t respond to requests for comment.
Sara’s death hit the Graham community hard, Graham Superintendent Kirk Koennecke said, and will have a lasting impact on the school.
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Students and teachers at the school are still mourning her death, he said.
“If we find there are other new developments in the case where this horrible tragedy could have been avoided, we are going to mourn even more,” Koennecke said. “It will be a senseless loss of life that could have been avoided.”