This is a very, very odd situation, and they deserve answers and they deserve closure,” an attorney for the Kobayashi family tells PEOPLE

The family of a Hawaii woman who vanished after landing in Los Angeles three weeks ago have expressed frustration with investigators and say they haven’t seen the surveillance footage that shows her walking across the border into Mexico.

The family of missing Hawaii woman Hannah Kobayashi is demanding to see surveillance video of that purportedly shows her crossing into Mexico after the Los Angeles police declared her a voluntarily missing person.