Nancy Guthrie, the mother of NBC's Savannah Guthrie, remains missing after nearly 40 days in Arizona.

Savannah Guthrie made an off-camera appearance at offices of NBC's “Today” show, her first time back since her mother Nancy went missing from her Arizona home.

“Today” show host Savannah Guthrie and her sister returned to their mother’s home outside Tucson in their first sighting at the house since Nancy Guthrie went missing a month ago.

The no-parking zone around the home of “Today” show host Savannah Guthrie’s mother where journalists and social media streamers have stationed themselves over the past three weeks since her disappearance is being widened.

“Today” show host Savannah Guthrie says her family is now offering a $1 million reward for information leading to the recovery of her mother.

“TODAY” co-anchor Savannah Guthrie announced her family is offering a reward of up to $1 million for the recovery of her 84-year-old mother, Nancy Guthrie, who disappeared more than three weeks ago.

The disappearance of “Today” show host Savannah Guthrie’s mother three weeks ago has inspired volunteers to launch their own searches in the dense desert near her home just outside Tucson.

Criminal investigators hoping to develop a suspect are turning to a powerful cyber tool by asking Google to disclose who had been searching for relevant information.

When the American men’s hockey team retreated to their locker room to celebrate their Winter Olympics gold medal win, they were joined by a special guest from the United States: FBI Director Kash Patel.

Authorities trying to solve the disappearance of Nancy Guthrie say they might tap DNA genealogy databases.

Investigators in the Nancy Guthrie disappearance say DNA from gloves did not match any entries in a national database.

Investigators working on the disappearance of “Today” show host Savannah Guthrie’s mother are consulting with Walmart management to develop leads.

Catch up on the latest news updates from Houston and around the world.

The FBI says a glove containing DNA was found about two miles from Nancy Guthrie’s Arizona home and appears to match those worn by a masked person outside her front door the night she vanished.

Law enforcement investigating the disappearance of “Today” show host Savannah Guthrie’s mother have blocked off a road near Nancy Guthrie’s home in Arizona.

A former Houston Police Department sketch artist, recognized by Guinness World Records as the most successful in her field, has volunteered her expertise to help identify a masked individual captured in the Nancy Guthrie video.

More than 4,000 calls came into an Arizona sheriff's department within 24 hours after the release of videos of a masked person on Nancy Guthrie’s porch.

Investigators in Arizona want residents near Nancy Guthrie’s home to share surveillance camera footage of suspicious cars or people in the month before the disappearance of “Today” show host Savannah Guthrie's mother.

Catch up on the latest news updates from Houston and around the world.

A man detained by police for questioning in the disappearance of Nancy Guthrie has been released while investigators hope that images of a masked person on her Arizona porch still will bring tips from the public to help solve her apparent abduction.

In a significant breakthrough in the Nancy Guthrie disappearance case, FBI investigators successfully recovered crucial doorbell camera footage that had initially been thought lost, revealing that digital evidence can sometimes persist even after devices are disconnected or damaged.

Investigators are still searching for Nancy Guthrie as the case reaches it's 11th day.

Chris Nanos has had a long career in law enforcement, but he admits he isn’t used to the amount of scrutiny that has come with leading the investigation into the disappearance of “Today” show host Savannah Guthrie’s mother.

Catch up on the latest news updates from Houston and around the world.

FBI agents are fanning out across an Arizona neighborhood not far from Nancy Guthrie’s home.

A man has been detained for questioning in connection to the disappearance of Nancy Guthrie, the mother of TODAY show co-host Savannah Guthrie, a person familiar with the matter told NBC News.

Investigators have found surveillance footage of an armed, masked person at Nancy Guthrie's doorstep on the night she disappeared.

Authorities are expected to release a surveillance photo showing a potential subject in the investigation into the disappearance of Nancy Guthrie, the mother of “TODAY” co-anchor Savannah Guthrie, according to two senior law enforcement officials.

Authorities are expected to release a surveillance photo showing a potential subject in the investigation into the disappearance of Nancy Guthrie, the mother of “TODAY” co-anchor Savannah Guthrie, according to two senior law enforcement officials.

Officials say a person has been detained for questioning in the disappearance of Nancy Guthrie.

The FBI says it is unaware of any continued communication between Savannah Guthrie’s family and suspected kidnappers.

The investigation into the apparent kidnapping of Nancy Guthrie, mother of "Today" show host Savannah Guthrie, continues.

Savannah Guthrie has told the potential kidnappers of her mother Nancy Guthrie that the family is prepared to pay for her safe return.

Moments after the news broke about the apparent abduction of “Today” show host Savannah Guthrie’s mother, the floodgates opened on social media.

It's frequently a challenge for a news organization to cover a story that involves itself, or one of its employees.

Experts say abductions for ransom are rare, despite dramatic portrayals on TV.

The sheriff investigating the apparent abduction of “Today” show host Savannah Guthrie’s mother says it’s frustrating that a camera at Nancy Guthrie’s home wasn’t able to capture images of anyone the day she went missing.

Savannah Guthrie made a heart-wrenching plea for “proof of life” of her 84-year-old mother.

The family of “Today” show host Savannah Guthrie is renewing their plea for their mother’s kidnapper to contact them.

NBC says that veteran Olympics broadcaster Mary Carillo will replace Savannah Guthrie as co-host of opening ceremonies for the Winter Games in Italy.

NBC “Today” show host Savannah Guthrie has sent a public message to her mother's kidnapper saying that her family is ready to talk but wants proof that she is alive.

“Today” show host Savannah Guthrie has described her mother over the years as selfless, loyal and as a woman of great of faith.

Investigators have found signs of forced entry at the Arizona home of “Today” show host Savannah Guthrie’s mother.

An Arizona sheriff says the disappearance of the 84-year-old mother of “Today” show host Savannah Guthrie over the weekend is being investigated as a crime based on what authorities saw at her home.