Plaintiffs lawyers representing 10 cities and counties across the state wanted their witnesses to show Santa Clara Superior Court Judge James Kleinberg one crucial point: lead paint currently poses a widespread and severe threat to their residents.

But defense lawyers, who contend lead paint in older residences no longer poses a threat, did not let the experts' data go unchallenged. Their questioning focused on the decline in lead exposure and other possible causes of lead poisoning, including candy and even chocolate-covered Mexican grasshoppers.