TUCSON, Ariz. — Investigators looking for the missing mother of "Today" host Savannah Guthrie have not ruled out the possibility that she may have been abducted by more than one person, according to authorities.

"The sheriff has said all along that while investigators are working to identify the person seen on doorbell video, they are not ruling out that that was the only person involved," a spokesperson for the Pima County Sheriff's Department told Fox News Digital Friday.

He also said it would be easier with two people to force or carry the victim out of the home.

"I think that the individual at the front of the house was accompanied by somebody who made entry at the rear of the house, and there was probably a driver involved," he said. "It would be very unwieldy to have just one person."

Joseph Giacalone, a retired NYPD sergeant and criminal justice professor at Penn State-Lehigh Valley, said the blood trail on Guthrie’s front steps supports this logic.

"My theory was that they had to have a vehicle around the corner to pick them up," he told Fox News Digital. "That’s why she’s bleeding at the front door. They couldn’t park the vehicle right out front, or it could spook a nosy neighbor."

While cell tower data has so far turned up no known leads, he suggested investigators get creative as the case drags on.

"I was so adamant about checking for a Wi-Fi router — was there any connections at that time?" he added. "Can walkie-talkie devices also be traced somehow?"

The Pima County Sheriff’s Department did not immediately respond to a request for comment Friday morning.

The FBI has described the suspect seen in surveillance images and video outside Nancy Guthrie's front door around the time she vanished as a male between 5 feet, 9 inches to 5 feet, 10 inches tall, with an average build.

The only officially identified item of clothing he carried was a black, 25-liter "Ozark Trail Hiker Pack" backpack.

Guthrie is believed to have been abducted from her home around 2:30 a.m. on Feb. 1. No suspects, persons of interest or vehicles have been publicly identified since then.