Investigators searching for missing 84-year-old Nancy Guthrie may find crucial clues in cellphone data, according to a retired FBI agent who says advanced tracking tools could play a pivotal role in ...

Only a few years ago, Tuesday’s announcement that a glove believed to be connected to the disappearance of Nancy Guthrie in Tucson, Arizona, had no match in a DNA database would have been a dead end.

In an aerial view, Pima County sheriff’s officers gather on Nancy Guthrie’s property on Tuesday in Tucson, Ariz. | Brandon Bell, Getty Images via CNN TUCSON, Ariz. (CNN) — Only a few years ago, ...

Passwords remain a persistent point of tension between usability and security. Controls designed to strengthen authentication often introduce complexity, which encourages users to rely on familiar ...

Add Yahoo as a preferred source to see more of our stories on Google. In an aerial view, Pima County sheriff's officers gather on Nancy Guthrie's property on February 17 in Tucson, Arizona. - Brandon ...