 And in the days to come, the world became the Park family's worst nightmare, as police abandoned whole neighborhoods to guard the wealthier parts of North and West L.A. Carol's mom was glued to Radio Korea, which became like a call center for Koreans trying to defend their businesses. People on the radio kept saying, we're calling the police, but no one's coming. Carol heard the shock and betrayal in their voices. NBC News talked to Korean business owners who had spent a lifetime building these businesses, now burning to the ground.