Scrutiny of public museums' ownership of looted antiquities came to a head one year ago in Southern California. Just after dawn, dozens of federal agents staged simultaneous raids on four museums. Federal authorities had investigated an alleged illegal tax write-off scheme that involved antiquities donated to museums. No one's been tried or convicted in the matter, and the U.S. Attorney says they're still investigating. KPCC's Adolfo Guzman-Lopez reports, the raids did change the way museums across the country conduct business.