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.

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 ...

Add Yahoo as a preferred source to see more of our stories on Google. The FBI recently received and is now analyzing potentially critical DNA recovered from the Tucson, Arizona, home of Nancy Guthrie, sources familiar with the investigation told ABC News.

DNA evidence recovered at Nancy Guthrie's Arizona home is still undergoing testing at the FBI's crime lab as the search for the missing mom reaches day 100.

A top FBI official is clarifying reports regarding critical new DNA information being found at Nancy Guthrie's home in Tuscon, Ariz. "This is not new evidence or information. FBI asked to test this DNA 2 months ago with the same technology we’ve always ...

TUCSON, Arizona — The FBI is analyzing what authorities describe as potentially critical DNA evidence in the ongoing investigation into the disappearance of 84-year-old Nancy Guthrie, a case that has drawn national attention. The new round of testing ...

Today host Savannah Guthrie's missing mom, Nancy Guthrie, was 'alive' when taken from her home according to a retired FBI profier weighing in on the case

The 84-year-old mother of "Today" anchor Savannah Guthrie was reported missing on Feb. 1.