"The IGG process pointed law enforcement toward Defendant, but it did not provide law enforcement with substantive evidence of guilt," the filing says. They said it isn't relevant to the prosecution because they will be relying on the direct DNA match, not the family tree. Prosecutors asked the judge to block the release of the information in the Investigative Genetic Genealogy to protect the identities of "hundreds" of Kohberger's relatives. "Specifically, with respect to DNA, an STR DNA analysis found Defendant’s DNA matched the DNA collected from the Ka-Bar knife sheath," the court filing said. Later still, investigators took a swab from Kohberger's cheek and made a direct comparison. They built out a family tree based on what they found and used other sources of information like social media and birth and death certificates.Īfter the Investigative Genetic Genealogy pointed investigators toward Kohberger, they obtained trash from the family home through a search warrant and performed an analysis to confirm that the DNA belonged to the father of the person whose DNA was on the knife sheath. They uploaded a profile of the DNA sample to a public database where people can upload their own DNA profiles generated by services like and 23andMe. Next, investigators used a process called Investigative Genetic Genealogy. They started with the genetic material located on the knife and tried uploading it to the Combined DNA Index System or CODIS, a database of DNA from people convicted of crimes, people who have been arrested, and DNA from other crime scenes. The new court filings shed light on how investigators got the initial DNA match that led them to Kohberger. How investigators used DNA to link him to the crime The DNA from the knife sheath came from a single male source, authorities have said. "The comparison showed a statistical match – specifically, the (short tandem repeat) profile is at least 5.37 octillion times more likely to be seen if Defendant is the source (of the DNA) than if an unrelated individual randomly selected from the general population is the source," the filing said. The new court filings reveal that DNA from a swab of Kohberger's cheek has been directly tied to the DNA on the knife sheath. Investigators announced previously that they had linked DNA found at the murder scene to DNA from Kohberger's father pulled from trash at the family home in Pennsylvania. New court docs say Kohberger's DNA is a match 13.Īuthorities have said he was identified through surveillance video, cellphone tracking and DNA, which was left on a knife sheath found in one of the victims' beds near her body. Kohberger, a 28-year-old former criminology student who attended a nearby university, was arrested in late December, weeks after the stabbing deaths of Ethan Chapin, 20 Madison Mogen, 21 Kaylee Goncalves, 21 and Xana Kernodle, 20, whose bodies were found by another roommate on Nov. Watch Video: Evidence links Bryan Kohberger to University of Idaho murdersĭNA from Bryan Kohberger, the suspect accused of murdering four Idaho college students last year, was a "statistical match" to DNA found at the crime scene, state prosecutors said in new court documents.
0 Comments
Leave a Reply. |