Twenty-six year-old Bunthan Roeung was shot and killed on March 1.
He and his friends were driving on Hollywood Boulevard when they got into an argument with a group in a gray or black Chevy Monte Carlo.
That car followed them onto the freeway, where one of the passengers opened fire.
Police hope someone will recognize the suspect.
Anyone with information is urged to call 1-877-law-full or 877-529-3855.