India, Oct. 26 -- Nancy Guthrie Case Latest Update Today: The investigation into the disappearance of Nancy Guthrie, the 84-year-old mother of Today co-anchor Savannah Guthrie, continues nearly nine months after she was reported missing from her home in Tucson, Arizona. A retired FBI special agent has now highlighted how jail informants and information gathered from inmates could potentially help investigators uncover new leads in the case.

In the October 21 episode of Brian Entin Investigates, NewsNation senior national correspondent Brian Entin spoke with former FBI special agent Maureen O'Connell about the ongoing investigation, the possible role of jail informants and the importance of keeping certain investigative details confidenti...