The crash happened on Ford Boulevard near Cesar Chavez Avenue in east Los Angeles early Sunday night. Candles now surround the scene where the boy was hit.
Surveillance video shows the boy's family on the side of the street and not in a crosswalk. They look both ways and then cross the street.
The video shows the 9-year-old boy dart out into the street to follow his family and then headlights from a speeding vehicle coming at him. Investigators say the car was traveling at a high rate of speed when it struck the boy and kept going.
The boy was transported to County-USC Medical Center, where he later died from his injuries.
Eyewitness News has learned the family may have been leaving a quinceañera party when the accident happened.
Investigators say the accident happened near the 710 Freeway off-ramp, which could explain the speed. But the driver was traveling above the legal speed limit and he did not stop after striking the 9-year-old boy.
The suspect's car is described as a red, late 1990's to early 2000's two-door Honda with tinted rear windows and a spoiler with brake lights.
If you have any information you're asked to contact the CHP at (323) 980-4600.