Excerpt - Academy Award-winning director and producer Steven Spielberg has turned over to federal authorities Russian Schoolroom, a 1967 oil on canvas by Norman Rockwell that was filched from a Clayton art gallery in 1973, according to the FBI. No charges have been filed in the case, and federal officials say they have no evidence that Spielberg knew the painting had been stolen when he purchased it in 1989. "It appears that he is an innocent buyer," says St. Louis-based FBI agent Frank Brostrom, a member of the agency's Art Crime Team, who initiated the investigation. Spielberg is an avid...