Armando Cardenas, 74, left his home in Pahrump, Nevada, planning to drive to California to visit family in late July 2006. He spoke with his daughter on July 28, 2006; that call was the last time his family heard from him. He was expected to arrive the next day and did not.

There was no sign of him at his Pahrump residence and no confirmed travel route. Three months after he vanished, on October 30, 2006, his vehicle was found abandoned in Baja, California — far from the destination he had intended and in the opposite direction of his planned trip. The car’s location introduced an international element to the investigation and deepened the unanswered questions about how and why it ended up there.

What information might explain how his vehicle reached Baja and what became of Armando?