Bangkok hotel deaths: Families of Vietnamese victims seek clarity on details of crime

It's been a week since six foreigners were found dead in a hotel room at Bangkok's Grand Hyatt Erawan. There is still no official conclusion on what happened, although Thai police have found cyanide in the room, indicating possible death by poisoning. CNA's Tung Ngo spoke to the mother of one of the victims, 36-year-old makeup artist Tran Dinh Phu.