The Fresno County coroner's office says 18-year-old Sylvia Garay had a .11 blood alcohol concentration when her Chevy Trailblazer overturned on Highway 99 in Central Fresno during the early morning hours of July 22.
A Greyhound bus crashed into the vehicle killing Garay and two other passengers and three others in the bus.
A .05 blood alcohol concentration is the legal limit for drunk driving for a person under the age of 21.
The CHP is now investigating where Garay was served alcohol that night. .