Andrew Tahmooressi says he earlier crossed border by foot , stayed at a Tijuana hotel . The U.S. government has said it will not allow the group to enter Mexico and that they must return to their home countries. His family says he had recently moved to Southern California to get treatment for PTSD . `` I do n't know what they 're going to do to help me , '' he said . U.S. Marine sergeant says he accidentally crossed Mexican border with three guns in March .
Andrew Tahmooressi says he earlier crossed border by foot , stayed at a Tijuana hotel . The U.S. government has said it will not allow the group to enter Mexico and that they must return to their home countries. His family says he had recently moved to Southern California to get treatment for PTSD . U.S. Marine sergeant says he accidentally crossed Mexican border with three guns in March .