FBI Sketch Artist Unveils First Suspect Image in Nancy Guthrie Case — Photos

New details have emerged in the death of "Today" show co-host Savannah Guthrie's 84-year-old mother, as federal authorities released a suspect description and a forensic sketch tied to the case.

The FBI has released new identifying details about the suspect seen on video at Nancy Guthrie's home the morning she disappeared.

According to NBC News, authorities are searching for a man who stands between 5 feet 9 inches and 5 feet 10 inches tall and has an average build. Investigators said he was wearing a black, 24-liter Ozark Trail Hiker Pack backpack, based on surveillance footage reviewed by the agency.

Around the same time, a forensic sketch tied to the case was shared publicly by Lois Gibson, a longtime FBI sketch artist.

In her Facebook post, Gibson explained that she created the image using surveillance photos of the suspect. She said parts of the man's face were covered by a ski mask, and she had to estimate the hidden features.

Gibson noted that only the eyes and part of the lips and mustache were somewhat clear in the footage.

Drawing on her 43 years of experience assisting detectives with similar images, she said she did her best with the available material and acknowledged she would accept responsibility if the likeness proved to be significantly inaccurate.

She also urged critics to create their own version instead of attacking her work.

The sketch quickly drew attention online, prompting a wave of reactions from netizens. One person wrote, "It Looks like the delivery driver they let go [sic]??!!!"

Another commented, "I can't wait until they catch this guy and see how close you are, great job Lois." A third added, "I bet you're close."

As investigators continue to search for the man seen outside Nancy Guthrie's home, authorities are urging anyone with information about the suspect or the case to come forward.