Comments 814 Vanished in the PacificSkip to Comments The comments section is closed. To submit a letter to the editor for publication, write to letters@nytimes.com. When Abigail Danian walked into her kitchen and saw the empty packaging of a burner cellphone on the counter, she knew Isaac had gone. It was Sept. 7, 2020, and she had been out of town for Labor Day. All weekend, her 20-year-old son, Isaac, had been calling her from the family home in Grand Rapids, Mich.