University of Idaho Murders


Kohberger's DNA profile linked to evidence at Moscow murder scene

DNA on the scene was "5.37 octillion times more likely" to be from Kohberger's developed genetic profile than an unrelated, random person.
Bryan Kohberger
Posted at 9:48 PM, Jun 20, 2023

MOSCOW, Idaho — A new filing has been released in the case of the University of Idaho Murders which expands on an affidavit released in January.

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These documents brought details of the case into the public eye for the first time, including the methods police and the FBI used to hone in on their suspect. At the time, the affidavit confirmed that DNA on the knife sheath recovered from the crime scene was linked to Kohberger.

The FBI created a DNA profile using the knife sheath with the hopes of testing it against a sample from Kohberger.

According to recently released documents, a short tandem repeat (STR) profile was developed using the evidence on the knife sheath. This process identifies protein sequences in a sample that can be compared to someone's DNA profile. Because these sequences are unique, a statistical match can be made based on these STR profiles.

The STR profile was compared against Kohberger's own DNA sample from a cheek swab, and profile scientists concluded that "the STR profile is at least 5.37 octillion times more likely to be seen if Defendant is the source than if an unrelated individual randomly selected from the population is the source."

The documents also outline a protective order sealing the development of the DNA profile and documentation related to the creation of the genealogical family tree used to identify Kohberger as a suspect.

Details on the sheath used in the creation of the STR profile were also released in the documents which added that the sheath was "partially under Madison's body and the comforter on the bed."

If convicted, Kohberger faces life in prison or the death penalty.