TUCSON, Arizona — Volunteer searchers fanned out looking for clues as the hunt for the missing 84-year-old mother of "Today" show cohost Savannah Guthrie entered its 22nd day.

Early on Feb. 22, volunteers gathered in the parking lot of a Tucson, Arizona, Hobby Lobby before beginning an informal search not far from Guthrie's house. The group recovered a backpack that was handed over to deputies.

Authorities had no updates on the investigation as of the morning of Feb. 22, according to Angelica Carrillo, a Sheriff's Department spokesperson.

Later, outside of Guthrie's home, Tucson resident Lupita Tello poked the dirt with a sharp metal rod soldered to a handle. After wiggling the rod in the dirt, Tello pulled it out and smelled the sharpened metal tip.

"If it smells bad like something decomposed, that's where we start," Tello said, showing reporters and true-crime streamers the main tool she uses in her searches for missing people in Mexico.