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A woman in San Diego says she saw a pregnant woman begging for money later drive off in a Mercedes Benz.

She stands outside local shopping centers every weekend with her son, sometimes with her husband, too, begging for money and apparently getting a lot of it, enough to afford a Mercedes.

"She sits there with the sign. He goes and parks the Mercedes. And they put up the sign and not less than five minutes, here she is getting money from all these people," said Michelle Smith, who took photos of the woman and her son in action.

Smith says the panhandler came after her with a big rock when she saw the camera.

"Next thing I know, she picks up this big boulder, about this big, goes over her head. I don't know if pregnant people can do that, but it was pretty big over her head and coming at me with this rock," Smith said.

Another witness saw the whole thing and called 911.

Police ran the license plate on the Mercedes, and traced it to an apartment in the suburbs of San Diego, but by the time a reporter showed up there, the panhandler and her family had already moved out.