The footage shows a man walking behind the 11-year-old girl on the street and sidewalk in a residential neighborhood.
He approaches her from behind and gropes her, as she tries to break free.
Suddenly, a neighbor is heard shouting "Hey leave her alone!"
The voice startles the man, who lets the girl go, turns around and gets into a nearby car. He drove off in the gray Nissan Kicks.
The incident happened Monday around 3:15 p.m. in the area of M Street and Gulf Avenue, according to the Los Angeles Police Department.
Anyone with information is urged to contact detectives at (310) 726-7900.
Search for attempted kidnapping suspect who sexually assaulted 11-year-old girl in Wilmington