A $50,000 #reward is now being offered to find the 24-year-old driver, who was caught on video being confronted by a bystander for fleeing the scene. Detectives say Sierra Whittaker was driving the white Porsche Panamera and was traveling almost 100 miles per hour when she crashed into 25-year-old Emerson Gonzalez-Escobar, killing him. #SouthLA

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