She Said "Dude, be nice to that homeless guy." So he slugged her. Video from Venice!

Los Angeles police said Wednesday they were looking for a man whom a security camera filmed assaulting a woman just outside a Venice Beach store. The video is embedded below.

The man not only slugged the woman, who is seen sitting on the sidewalk rubbing her jaw; he also throws a man who tries to detain him over his shoulder.

The LAPD says they know the man's name. But they are withholding it from the media--meaning that Police think they know where to find him. When they do, Police intend to arrest him, then ask him whether his mother told him never to hit girls.

The assault occurred around 7:30 p.m. Sunday near the intersection of Pacific Street and Windward Avenue. This is a very busy intersection one block from the beach and Venice boardwalk, where the old "VENICE" sign is visible. The original buildings built in Venice are on that intersection.

Surveillance video captured the suspect punching a woman in her face, both of them white.

A preliminary investigation revealed the suspect was speaking to a homeless man when the woman intervened, telling the suspect to leave him alone, police said.

The man and woman later ran into each other at the store, which led to the angry altercation.

The motive for the assault remains under investigation. No arrest has been made.

The assault stemmed from an earlier argument between the two strangers, said Sgt. Gregory Probst with the Los Angeles Police Department's Pacific Division.

The man was haranguing a homeless man when the woman intervened, telling him to leave the him alone, Probst said. The two later ran into each other in a store, and the assault occurred outside of it.