Nancy Guthrie’s house in Tucson, Ariz.
(Evan Garcia/Reuters)

It’s been almost two months since Nancy Guthrie was reported missing from her home near Tucson, Ariz., where police believe the 84-year-old mother of Today show cohost Savannah Guthrie was abducted.

In her first interview since her mother’s disappearance, Savannah Guthrie detailed the torment her family has been going through when she sat down with NBC colleague Hoda Kotb, who has been filling in for Savannah on the Today show.

“Someone needs to do the right thing,” Guthrie said through tears. “We are in agony. It is unbearable.”

In the wide-ranging interview, Savannah talked about the first moments she learned of her mother’s disappearance, addressed speculation about her family’s involvement and the message she said she heard from God about her mother. The first two parts of the interview aired on March 26, and the third is scheduled to air on March 27.

Savannah Guthrie with her mother Nancy Guthrie in 2015, and an aerial view of Nancy Guthrie’s home.
(Photo illustration: Yahoo News; photos: Don Arnold/WireImage via Getty Images, Evan Garcia/Reuters)More

Hundreds of local and federal investigators have spent weeks scouring her Catalina Foothills neighborhood and thousands of hours of surveillance footage and evaluating tens of thousands of tips that have poured in since her disappearance.

“This remains an active investigation and will continue until Nancy Guthrie is located or all leads have been exhausted,” the Pima County Sheriff’s Department said earlier this month.

But authorities have made no arrests, nor have they publicly identified a motive in a baffling case that has captured the nation’s attention.

Savannah Guthrie has issued multiple video pleas on Instagram throughout the search, and the family is now offering $1 million for information leading to Nancy Guthrie’s “recovery.”

Below is a timeline of key developments in the investigation.

Jan. 31

Nancy Guthrie is last seen around 9:45 p.m. when she is dropped off by her family at her home in the Catalina Foothills north of Tucson, Ariz., after having dinner with her daughter Annie Guthrie, who lives nearby.

Feb. 1

Nancy Guthrie’s pacemaker stops syncing with her Apple devices at 2:28 a.m., according to police.

She is reported missing around noon after she did not show up at a friend’s house to watch an online church service.

Feb. 2

Pima County Sheriff Chris Nanos says police believe Nancy Guthrie was kidnapped and didn’t leave her home on her own.

Savannah Guthrie posts an Instagram message asking for people’s prayers.

Feb. 3

Pima County Sheriff Chris Nanos.
(Jan Sonnenmair/Getty Images)

TMZ and two Tucson television news stations receive what appears to be a ransom note, demanding millions of dollars in bitcoin. The FBI is not able to immediately verify its authenticity.

Feb. 4

Nancy Guthrie’s adult children post an Instagram video addressing a possible kidnapper, saying that the family is ready to talk, but they need proof that their mother is alive.

President Trump says in a Truth Social post that he spoke to Savannah Guthrie and is directing “ALL Federal Law Enforcement to be at the family’s, and Local Law Enforcement’s, complete disposal, IMMEDIATELY.”

Feb. 5

Investigators reveal that the blood found on the front porch belongs to Nancy Guthrie.

Police release a detailed timeline of the hours leading up to Guthrie’s disappearance.

The FBI offers a $50,000 reward for information that leads to her return.

Feb. 9

Savannah Guthrie releases another Instagram video pleading for the public’s help, saying, “We are at an hour of desperation.”

Feb. 10

Surveillance images of the home of Nancy Guthrie the night she went missing.
(Photo illustration: Yahoo News; photos: FBI via AP)

FBI releases video and images of what it said was an “armed individual” appearing to tamper with a doorbell camera at Nancy Guthrie’s home in the early morning hours of Feb. 1.

Authorities detain and later release a delivery driver after carrying out a “court-authorized search” of his Rio Rico, Ariz., home. He tells reporters: “I hope they get the suspect, because I’m not it.”

Feb. 11

Investigators widen their search outside of Nancy Guthrie’s home in the Catalina Foothills. FBI agents recover a pair of black gloves about 2 miles away and submit them for DNA testing.

Feb. 12

The FBI releases a new description of the suspect seen in the doorbell camera footage, who is described as “approximately 5’9”-5’10” tall, with an average build.” The agency shares specific details of the bag the person is believed to have been carrying, a black, 25-liter “Ozark Trail Hiker Pack.” The FBI also doubles its reward to $100,000.

Feb. 13

FBI and SWAT pursuing their investigation about two miles from Nancy Guthrie’s residence.
(Brandon Bell/Getty Images)

Law enforcement, SWAT and forensics teams swarm two locations, including one on the edge of Guthrie’s Catalina Foothills neighborhood. But no arrests are made.

Feb. 15

Savannah Guthrie posts a new video addressed “to whoever has her or knows where she is,” saying, “It’s never too late to do the right thing.”

Feb. 16

Pima County Sheriff Chris Nanos releases a statement saying all members of Nancy Guthrie’s family, including siblings and spouses, have been cleared as possible suspects. “To suggest otherwise is not only wrong, it is cruel,” Nanos said.

Feb. 17

Pima County law enforcement gather on Nancy Guthrie’s property.
(Brandon Bell/Getty Images)

Police say DNA from gloves found about 2 miles away from Nancy Guthrie’s house turned up no matches in the FBI’s national database.

The focus of the investigation now turns to her pacemaker and the suspect’s backpack, as well as the person’s unique gun holster.

Feb. 20

Authorities, who say they have been inundated with calls about the case, ask people with well-wishes or case theories to stop calling their tip lines.

Feb. 24

Savannah Guthrie posts a new video announcing the family’s $1 million reward for information that leads to Nancy Guthrie’s “recovery.” The Today host says that while the family still believes “in a miracle,” they “also know that she may be lost. She may already be gone.”

Savannah also announces a $500,000 donation to the National Center for Missing and Exploited Children.

Feb. 26

A message board for Nancy Guthrie.
(Joe Raedle/Getty Images)

Multiple news outlets report that the FBI is reducing the number of personnel investigating Nancy Guthrie’s disappearance in Tucson and relocating its command post to Phoenix.

Feb. 27

The Pima County Sheriff’s Department says it is “refocusing resources” in the Nancy Guthrie case but not giving up the search. “This remains an active investigation and will continue until Nancy Guthrie is located or all leads have been exhausted,” the sheriff’s department said.

March 4