Investigators looking for Savannah Guthrie’s mother, Nancy Guthrieare turning to comparable know-how as soon as used to seize convicted assassin Bryan Kohberger.
A press launch issued on Tuesday, February 17, by the Pima Sheriff’s Workplace confirmed the information after noting {that a} pair of gloves discovered two miles away from Nancy’s Arizona residence on Thursday, February 12, didn’t “set off a match” within the “nationwide CODIS database.” (The database electronically compares DNA profiles.)
“Investigators are at the moment wanting into extra investigative genetic family tree choices for DNA proof to verify for matches,” the assertion learn. (Investigative genetic family tree — generally abbreviated to IGG — was utilized in Kohberger’s 2022 arrest in relation to the Idaho faculty murders.)
In accordance with the Worldwide Society of Genetic Family treeIGG entails “the science of utilizing genetic and genealogical strategies to generate leads for regulation enforcement entities investigating crimes and figuring out human stays.”
Tuesday’s assertion expanded on the outcomes achieved via the gloves’ testing. “(It) didn’t match DNA discovered on the property. The DNA discovered on the property is being analyzed and additional testing must be executed as a part of the investigation.” (Undisclosed DNA proof was recovered immediately from Nancy’s residence after she was kidnapped within the early hours of February 1, per reporting by NBC Informationwhereas the glove was discovered two miles from Nancy’s residence multiple week later.)
An article revealed by CNN in March 2025 mirrored on the Kohberger case and the way IGG was particularly used to safe essential proof towards him. Kohberger, 31, was sentenced to 4 consecutive life phrases with out parole for the stabbing murders of 4 College of Idaho college students in 2022. (Kohberger pleaded responsible to keep away from the demise penalty.)

Nancy Guthrie
Courtesy of Savannah Guthrie/InstagramThe outlet reported {that a} “knife sheath” contained DNA that “authorities used IGG … to attach that pattern to Kohberger’s household. It additionally famous that subsequent DNA testing, together with fingernail clippings taken from one of many victims, discovered a “statistical match” to the knife pattern, which led to Kohberger’s arrest.
Nancy, 84, was first reported lacking on February 1 after she didn’t attend a digital church service. She was final seen one evening prior by her daughter, Annie Guthriewho dropped the matriarch off at her Catalina Foothills residence following a household dinner.
As the continuing search moved into its second week, FBI director Kash Patel launched a sequence of black-and-white photographs and video that confirmed a person out the entrance of Nancy’s residence with what gave the impression to be a gun held in his waistband. The particular person was wearing a full masks and gloves as they tried to protect Nancy’s residence safety digicam earlier than the digicam was fully dismantled and faraway from a wall beside the entrance door.

Bryan Kohberger
AP Photograph/Kyle Inexperienced, PoolThe FBI later launched a proper description of the person, detailing that he was doubtless “a male, roughly 5’9 – 1’10” with a median construct,” and noting that he was “carrying a black, 25-liter ‘Ozark Path Hiker Pack’ backpack” within the black-and-white recordings.
A subsequent search led by authorities all through the encompassing areas of Nancy’s residence collected “16 gloves in numerous areas,” based on the FBI and NewsNation Senior Nationwide Correspondent Brian Entin.
“Most of them have been searchers’ gloves that they discarded in numerous areas once they searched the neighborhood,” Entin wrote by way of X on Sunday, February 15. “The one with the DNA profile recovered is totally different and seems to match the gloves of the topic within the surveillance video. The FBI has and can proceed to offer help on no matter timeline is offered to us.”
