LOS ANGELES -- Los Angeles South Traffic Division detectives are looking for 24-year-old Sierra Whittaker. Police say she's the driver behind a fatal hit-and-run crash that killed 25-year-old Emerson Gonzalez-Escobar on July 5.

The violent crash happened just after 9 p.m. the day after Independence Day.

Detectives say Whittaker was driving a white Porsche Panamera and was traveling almost 100 miles per hour when she crashed into Gonzalez-Escobar, killing him. He was waiting for an ambulance to pass him while he was waiting to make a left turn.

Whittaker and her two passengers were caught on cellphone video getting their belongings out of the car. A bystander took cellphone video asking the women why they didn't go help the victim. That's when Whittaker confronted the person recording t

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