Pima County Sheriff’s Department detectives are searching a septic tank behind Nancy Guthrie’s house, with drone footage showing them opening a manhole cover in the backyard.
The 84-year-old was last seen over a week ago after she was dropped off at her Tucson, Arizona, home by her daughter and son-in-law.
It comes as police restated that they have no suspects or persons of interest identified in the case.
This is a developing story. Please check back for more information.