Friday evening, 45-year-old Michelle Vega was driving westbound on Jensen Avenue west of Del Ray Avenue.
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35-year-old Ofelia Santana was in the passenger seat.
The California Highway Patrol says Vega entered the center median and then overcorrected to the right and lost control of the vehicle, overturning on the right shoulder.
Vega had moderate injuries.
Santana was not wearing a seatbelt and was thrown from the vehicle.
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She died at the scene.
Vega has since been arrested for felony DUI and booked into the Fresno County jail.
She's being held on $102,000 bail.