India, Feb. 27 -- Nancy Guthrie remains to be found after the 84-year-old was reported missing by her family on February 1. Authorities believe she was taken from her home near Tucson, Arizona, the night before.

The FBI, which is working the case with the Pima County Sheriff's Department, released doorbell video footage from Guthrie's house the night she was taken. It showed a masked suspect at her door.

The FBI also released a suspect description based on the footage, and authorities are trying to zero in on the person, based on their apparel and accessories, as seen in the video. Amid this ongoing search, a person called up an independent investigative reporter, alleging that they'd found a potential clue in the footage, that could he...