Witnesses said the cars appeared to be going at least 100 miles an hour.
Lee Liu Chan, 25, was killed after he lost control of his car and slammed into a tree and light pole. Witnesses say Chan had run a red light when another car turned in front of him.
His 21-year-old cousin Erin Mua has been charged with vehicular manslaughter. He is expected to be arraigned on Tuesday at the Bellflowercourthouse.
- Get more local news headlines from Los Angeles
- Have a news tip? Send your tips, video, or pictures