Sunday marks the third week since 84-year-old Nancy Guthrie, the mother of NBC "Today" show host Savannah Guthrie, ...

The search for Nancy Guthrie, mother of 'Today' show co-host Savannah Guthrie, continues into its 22nd day as investigators analyze mixed DNA and focus on a masked individual seen on doorbell video.

A major setback has occurred when it comes to the DNA that was recovered from the scene in the ongoing Nancy Guthrie ...

Investigators are hopeful that some of the DNA that was found at Guthrie's home can be parsed and help point to a suspect in her disappearance.

Pima County Sheriff Chris Nanos revealed that there are problems with the DNA evidence collected from Nancy Guthrie’s house ...

As investigators pass the three-week mark since Nancy Guthrie was last seen by her family, the sheriff leading the search had ...

With limited other evidence directly incriminating Brandon Davis, prosecutors secured a conviction using a confessed killer and jailhouse informants.

Police continue to search for Nancy Guthrie, the 84-year-old mother of the "Today" show's Savannah Guthrie, as her disappearance nears three weeks.

Law enforcement agencies have yet to name a suspect, but they are looking for a man seen on surveillance camera outside Guthrie's home wearing a mask and gloves and carrying a backpack.

Ancient microbes tied to our earliest ancestors could use oxygen, reshaping ideas about how complex life began on Earth.

When a homicide detective in California’s Central Valley last year reopened the investigation into the unsolved killing of a ...