Nancy Guthrie, the mother of 'Today Show' co-anchor Savannah Guthrie, has been missing for 20 days now, but there have been no concrete updates about her whereabouts until now.

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.

Authorities have struggled to come up with a motive for someone abducting Guthrie. Now, a former FBI agent has shared his own possible theory on what motivated the suspected perpetrator. Jonny Grusing ...

Last year, Erin Deborah Waks took a swab test that would shed light on her family's lost heritage - and then took her grandmother on the journey of a lifetime to discover their story.

It's easier than ever to test for sexually transmitted infections at home. We break down whether or not you should. Getting tested for sexually transmitted infections can feel complex, confusing, or ...

Pima County Sheriff Chris Nanos said there has been a snag at the private lab in Florida, testing mixed DNA samples found at ...

The remains from a 20-year-old cold case have been identified after using advanced DNA testing, according to Arkansas ...

Detectives are vetting nearly 20,000 tips as the search for 84-year-old Nancy Guthrie enters its fourth week in Tucson.

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.

A federal jury in Texas convicted a former NFL player -- and current laboratory owner -- for orchestrating a $328 million health care fraud scheme.

Over four decades after a teenager was murdered, DNA found on a discarded cigarette has helped authorities catch her killer. Sarah Geer, 13, was last seen leaving her friend’s house in Cloverdale, ...