Idaho Prosecutor Jeff Nye’s DNA Argument Secures Key Evidence in Bryan Kohberger Case, Ensuring Genetic Genealogy Stays in Court

Published Time: 08-20-2025, 14:30

Introduction

A pivotal courtroom battle determined the fate of Bryan Kohberger’s prosecution in the University of Idaho murder case. Prosecutor Jeff Nye, chief of the criminal division at the Idaho Attorney General’s Office, successfully defended the use of investigative genetic genealogy (IGG) evidence against constitutional challenges, helping secure Kohberger’s conviction.

The Pivotal Argument in Court

When Kohberger’s defense team sought to exclude DNA evidence obtained through IGG, Nye stepped in to argue that the process did not violate the Fourth Amendment. Although the FBI had technically violated its own internal policies by uploading crime scene DNA to a genealogy database, Nye maintained that such policies did not impose legal restrictions on otherwise lawful investigative actions.

“The stakes could not have been higher,” Nye told Fox News Digital, emphasizing that the court’s decision would shape the trajectory of the case.

Judge Steven Hippler ultimately agreed with Nye’s position, ruling in February 2023 that the evidence could stand. He reasoned that DNA left at a crime scene carried no reasonable expectation of privacy under constitutional protections.

Why the Decision Mattered

Had the court ruled differently, prosecutors risked losing not only the DNA match to Kohberger but also a wide array of evidence derived from it. Nye explained that without the IGG identification, investigators would not have obtained cellphone records, search warrants, or access to Kohberger’s digital devices.

“It would have been devastating,” Nye said. “That argument was everything.”

The successful defense ensured the state could move forward with a full body of evidence linking Kohberger to the crime.

The Role of Genetic Genealogy in the Case

Investigative genetic genealogy, a relatively new forensic tool, was key in identifying Kohberger. State police and the independent lab Othram initially pursued leads until December 10, 2022, when the FBI intervened and submitted crime scene DNA to a commercial genealogy database.

Although this raised controversy over privacy and policy violations, the court determined the practice was legally sound. The FBI later declined to comment directly, pointing to Judge Hippler’s written ruling.

Kohberger’s Guilty Plea and Sentencing

Kohberger was charged in the November 13, 2022 murders of four University of Idaho students: Madison Mogen, 21; Kaylee Goncalves, 21; Xana Kernodle, 20; and Ethan Chapin, 20. Investigators linked him to the crime after finding his DNA on a Ka-Bar knife sheath left at the scene.

Following months of failed attempts to suppress evidence and challenge the potential death penalty, Kohberger pleaded guilty in July 2025. He received four consecutive life sentences without parole, plus an additional 10 years for burglary. As part of his plea agreement, he waived his right to appeal.

Nye said he deliberately avoided looking at Kohberger during sentencing, instead focusing on the victims’ families as they delivered emotional impact statements.

A Turning Point for Idaho Prosecution

Nye’s success in the Kohberger case underscored his growing role in Idaho’s legal system. After Attorney General Raul Labrador took office in 2023, Nye was promoted to head the criminal division, tasked with reshaping how the state collaborates with county prosecutors.

Rather than taking over local cases or staying uninvolved, Nye advocated for providing direct support to smaller jurisdictions in major prosecutions. “A community’s ability to bring killers to justice should not depend on population or budget,” he said.

Alongside Nye, deputy AG Madison Gourley and former deputy AG Ingrid Batey assisted in the case. Latah County Prosecutor Bill Thompson led the prosecution, supported by his deputy Ashley Jennings, who managed discovery and pretrial motions. Former U.S. Attorney Joshua Hurwit was also commissioned to assist if the case had gone to trial.

Lasting Impact of the Case

The Idaho murders case not only brought closure to the victims’ families but also set a legal precedent in the state regarding the admissibility of IGG evidence. For Nye, the argument over genetic genealogy was the defining moment of his career.

“Everything hinged on that argument,” he reflected. “If we lost, the case could have unraveled. Winning meant we could deliver justice for the victims.”