Holly Alcott White, 49, vanished from Taos, New Mexico, after a normal evening on May 5, 2016. She spoke with her husband and her best friend and played Words With Friends until about 10:30 p.m., which is the last confirmed contact. The next morning she missed a routine walk; her friend entered Holly’s home with a key and found Holly’s purse, cell phone, and her dog Rosie inside, but Holly and her blue Ford Escape were gone.

That same day the Escape was found parked at the Rio Grande Gorge Bridge, about 10 miles west of Taos, with the keys in a cup holder. A vendor said the car had been there since at least 6:15 a.m. Dive teams searched 12 to 16 miles of the river without finding Holly; a single black Skechers shoe believed by friends to be hers was recovered floating in the water. Family and friends say Holly would not have left without her dog or a note. Her husband, who was in Albuquerque, cooperated with investigators, passed a polygraph, and has been ruled out as a suspect. A private investigator hired by the family continues to work the case and has named persons of interest without publicly identifying suspects.

What did anyone see or hear near the Rio Grande Gorge Bridge around dawn on May 6, 2016?