The 84-year-old mother of "Today" host Savannah Guthrie is believed to have been taken against her will from her Tucson, Ariz., home in the early morning hours of Feb. 1 Don Arnold/WireImage; FBI Phoenix/X Federal investigators are using new technology to ...

The FBI has uncovered a possible new lead in the search for Nancy Guthrie, the mother of Todayanchor Savannah Guthrie. DNA evidence, including hair, has been recovered from Guthrie's Tuscon, Ariz. home, and has been sent for analysis, per a Thursday ABC ...

A strand of DNA recovered from Nancy Guthrie’s Arizona home is undergoing extensive testing at the FBI’s crime lab as the investigation hit the 100-day mark — and authorities continue to hold out hope for a break in the case.

PIMA COUNTY, Ariz. -- The FBI recently received and is now analyzing potentially critical DNA recovered months ago from the Tucson, Arizona, home of Nancy Guthrie, sources familiar with the investigation told ABC News. Nancy Guthrie, the 84-year-old mother ...

The FBI is now utilizing new technology to conduct advanced analysis on the DNA sample.

The FBI is analysing a single unidentified strand of hair recovered from the bedroom of missing Arizona mum Nancy Guthrie, as experts warn that the digital and DNA work now at the heart of the 84‑year‑old's case in Pima County could take months,

The FBI confirmed it is analyzing a hair sample that could contain DNA linked to Nancy Guthrie‘s abductor. The hair sample was recovered from Guthrie’s home in February and has been sent from a private Florida lab to the FBI for further analysis.