India, Feb. 14 -- A former FBI agent has shared insights on law enforcement searching Annie Guthrie's house and the neighboring properties as Nancy Guthrie remains missing. The 84-year-old was reported missing on February 1 and authorities believe she was kidnapped from her home near Tucson, Arizona, the night before.

While authorities have not named any suspects in the case yet, speculations have been rife about Annie and her husband Tommaso Cioni. The latter is reportedly the last person to see Guthrie before she went missing and dropped her off home after the octogenarian had had dinner with her daughter, Cioni's husband, Annie.

At the same time, buzz about Annie began to gain steam when it was initially reported that law enforcement...