Investigators are working to identify DNA found at Nancy Guthrie's property, the Pima County Sheriff's Department said in an update on Friday.

"DNA other than Nancy Guthrie's and those in close contact to her has been collected from the property," the sheriff's department said. "Investigators are working to identify who it belongs to. We are not disclosing where that DNA was located."

Several gloves were found amid the investigation, with the closest located approximately 2 miles from Nancy Guthrie's home, the Pima County Sheriff's Department also said.

"Reports that a glove was found inside the residence or on the property are inaccurate," the sheriff's department noted.

DNA was recovered from several gloves and other pieces of potential evidence, and those DNA samples are now being compared to samples taken from associates of Nancy Guthrie, Pima County Sheriff Chris Nanos told ABC News Friday.

The sheriff said he is hopeful investigators are “getting closer” to solving the case.

“We've gotten DNA back,” Nanos said.

“They already have the genetic markers of those that we think had access to the home,” he said, including members of Guthrie’s family and household help.

“Now we have to go through and try to eliminate people," Nanos said.

Several gloves have been found throughout an expanded search zone within a 10-mile radius of Guthrie’s home, the sheriff said. No gloves were found at her house.

Investigators planned to return to Guthrie’s house as soon as Friday to take additional measurements from the front doorway, where the suspect lurked. They have estimated his height to be 5 feet 9 to 5 feet 10 inches, and now the hope is to determine the man’s weight.

“It is really about just taking that video and frame-by-frame and trying to get as much out as we can,” Nanos said.

Other investigators are trying to trace the point of sale of the backpack sold at Walmart the suspect was seen carrying.

Walmart declined to comment on whether it is assisting the investigation.

The individual detained earlier this week for questioning in Rio Rico, Arizona -- who identified himself as Carlos -- is not fully cleared even though he has been released and is under no law enforcement restrictions, the sheriff said.

“Nobody's fully cleared,” Nanos said. “He talked with us, he was cooperative.”

Nanos said the sheriff’s department and FBI are working side-by-side to find Nancy Guthrie.

“We're not giving up,” Nanos said. “If Nancy's out there, we're going to find her. We're not giving up.”

-ABC News’ Aaron Katersky

President Donald Trump said on Friday that "when the FBI got involved" in the Nancy Guthrie case, "I think, you know, progress has been made."

Asked by reporters if he thought drug cartels or people from another country could be involved in the kidnapping, Trump replied, "You can’t say that yet."

"It's a little bit early. But it's -- somebody either knew what they were doing very well, or they were rank amateurs. Either way, it's not a good situation," Trump said.

-ABC News’ Michelle Stoddart

The FBI released new details about the suspect sought in the kidnapping of Nancy Guthrie, who was seen outside her front door early on Feb. 1, armed while wearing a backpack, mask and gloves.

"The suspect is described as a male, approximately 5'9" - 5'10" tall, with an average build," the FBI said in a post on X on Thursday. "In the video, he is wearing a black, 25-liter 'Ozark Trail Hiker Pack' backpack."

The FBI released several images of the type of backpack worn by the suspect alongside a still from Nancy Guthrie's doorbell camera video.

The FBI said it confirmed the new details "after a forensic analysis of the doorbell camera footage."

"We hope this updated description will help concentrate the public tips we are receiving," the FBI said.