Hannah Kobayashi, the Hawaii woman who’s been missing for more than three weeks after arriving in Los Angeles on a flight from Maui, has been declared a voluntary missing person, Los Angeles police said Monday.

Late Sunday, after traveling to the US-Mexico border, the LAPD reviewed video surveillance from US Customs and Border Protection which shows Kobayashi crossing the United States border into Mexico. The surveillance was reportedly from Tuesday, Nov. 12 at around 12:13 p.m.