April Stonehouse, forensics professor at Arizona State University, analyzed key breakthroughs in the search to find Nancy Guthrie.

Savannah Guthrie's mother Nancy Guthrie has been missing for nearly six weeks, but investigators in Arizona believe they have a motive behind her kidnapping — though they're hesitant to share it publicly.

The Pima County Sheriff's Department said it's still analyzing "various forms of evidence" as the search for the missing 84-year-old continues.

The search for Nancy Guthrie continues as true crime streamers discovered a suspicious barrel in a river near her Tucson home

Over a month has passed since Nancy Guthrie was last seen. Here's what to know about the 84-year-old and where the investigation stands.

A woman that was found dead near a canal roughly 100 miles away from Nancy Guthrie's Arizona home has been identified, RadarOnline. com can reveal.

Pima County Sheriff Chris Nanos amended his public résumé after The Arizona Republic found the document misrepresented his work history in El Paso.