Jayda Sanchez, her 5-year-old brother and their father were leaving a park Friday night when a possibly white four-door vehicle in front of them made an illegal U-turn in the 26000 block of South Vermont Avenue, authorities said.
The father swerved to avoid a collision, causing the truck to rollover multiple times and crash into a light pole. Jayda did not survive. Her brother and father remained hospitalized as of Monday morning.
The children's mother, Adriana Rodriguez, visited a memorial of candles and balloons set up near the crash scene over the weekend.
Harbor City rollover crash: Mother demands justice after 4-year-old daughter killed, son injured
She said she can't believe her baby girl is gone. Born premature, she fought to survive only to have her young life cut short by a suspect who left her to die in the streets.
The city of Los Angeles is offering a reward of up to $50,000 for information about the driver.
"You know it was you, just come forward. You have to do the right thing. Give her justice," Rodriguez said.