17-year-old Berenice Rodriguez was killed when the car driven by her classmate 18-year-old Anna Neuarez drifted off the road.
Officers said Neuarez over-corrected and crossed lanes and was broadsided by an oncoming car.
Two teenage boys who were also in the vehicle tell officers Neuarez was reaching for a ringing cell phone when the accident happened.
Many classmates and friends are still in shock over Rodriguez's death.
CHP said they are still investigating the cause of the crash, and if the driver was distracted by her cell phone she could face manslaughter charges.
