Ku traveled with her husband to Taiwan on 11/23/19. Ku and her husband went their separate ways on 11/29/19, with the plan being she was going to take a train from Hualien to Taipei to visit her family, and to reconnect with each other and travel back to the United States through SFO on 12/1/19. On 11/30/19, the husband received an e-mail from Ku requesting to extend her stay by a week and to change her flight date to 12/8/19. She has not been heard from since that e-mail was sent and was not on the return flight. Mountain View PD took the missing person case since Ku is a resident of the city in the event she re-enters the country. However, case is being actively investigated by the National Policy Agency Republic of China (Taiwan) since the last time she was physically seen was in Taiwan.