Case Watch · Police Practices
The Bryan Kohberger case shows why calling forensic genetic genealogy “just a tip” does not keep the work out of discovery. The defense still got into the records, relatives, database searches, SNP work, family tree, and agency handoff behind the identification.
By Christine Burke · 2026-08-23 · 15 min read
There's a phrase I hear a lot in forensic genetic genealogy cases:
It's just an investigative lead.
The Bryan Kohberger case is a good example of why that phrase doesn't necessarily make the FGG work disappear once the lawyers get involved.
The FBI ultimately gave Idaho investigators Kohberger's name and instructed them to treat that identification solely as "a tip." The State did not rely on the FGG results in the later warrant applications, and prosecutors said they did not intend to introduce the FGG work at trial.
That sounds pretty insulated.
It wasn't.
The defense still got into the FGG records, the relatives, the database searches, the SNP work, the family tree, the handoff from Othram to the FBI, and the policies surrounding the searches.
That's the part law enforcement should be paying attention to.
DNA was recovered from the knife sheath found at the King Road crime scene.
A single-source male STR profile was developed.
CODIS did not identify the contributor.
On November 22, 2022, Idaho State Police sent the sample to Othram for forensic genetic genealogy work. Othram developed an SNP profile and searched FamilyTreeDNA and GEDmatch Pro.
According to the later suppression order, Othram's work produced four brothers of interest who were described as low genetic matches.
One of those brothers was contacted and asked to provide a reference sample.
He declined.
Then the work changed hands.
On December 10, Othram was told to stop its genealogy work and turn over the SNP profile, search results, and preliminary report.
Idaho State Police gave that material to the FBI.
The FBI then used the Othram data to develop a significantly larger SNP profile and continued the genealogy work.
On December 19, the FBI gave Idaho investigators the name Bryan Kohberger as a possible source of the sheath DNA.
And the FBI told them to treat the name solely as "a tip."
That distinction matters.
At that point, Kohberger's DNA had not yet been directly compared with the sheath profile.
FGG had generated a name.
The later STR comparison was a separate step.
The State's position was pretty straightforward.
The FGG information wasn't used in the probable-cause affidavits.
The State wasn't planning to introduce the genealogy at trial.
Traditional investigation continued after the tip.
So from the prosecution side, the argument was basically:
Why does the defense need all of this genealogy material?
Anne Taylor's team went after it anyway.
They wanted to know how Kohberger became the name at the end of that process.
What matches were found?
What relatives were involved?
What did Othram do?
What did the FBI do?
Who else appeared in the genealogy?
What databases were searched?
What did the SNP information show?
What investigative notes existed?
What family tree was built?
How did the investigation move from relatives to Kohberger?
That wasn't some abstract curiosity.
The defense argued that it needed the material to evaluate how Kohberger was identified and whether there were other relatives who should have been considered.
That's probably the biggest police-practices point in the discovery fight.
In October 2023, Judge John Judge acknowledged the State's argument that the FGG material looked largely irrelevant because it had not been used to obtain the warrant for Kohberger's DNA and the State did not intend to present the FGG evidence at trial.
The court even said that position was well supported.
But the judge did not stop there.
The court found that Kohberger had met the relatively low threshold to show that at least some of the FGG information could be material to preparing the defense.
The court also found that some genealogy-service match results could qualify as results of scientific testing.
The FBI family tree and investigative notes were also analyzed as potential investigative reports or memoranda.
The court ordered an in-camera review to determine what should actually be disclosed.
That is worth sitting with for a minute.
The prosecution wasn't saying:
"We're going to prove guilt with a genealogy tree."
Quite the opposite.
The FGG was outside the warrant affidavits and outside the State's intended trial evidence.
The court still looked underneath it.
After reviewing the material privately, the court ordered partial disclosure.
Not everything.
This wasn't a free-for-all where the defense got unrestricted access to every relative and every record.
The court was clearly concerned about the privacy of innocent family members.
By June 2024, the disclosed FGG information was subject to a protective order.
Kohberger, his attorneys, designated experts, and defense investigators were permitted to view the material under restrictions.
The defense could not simply start contacting previously unknown people in the family tree. Court approval was required before those contacts could occur.
So the relatives were protected.
But the underlying point remains:
A genealogy investigation that the State did not intend to introduce at trial still ended up in the hands of the court, the defense team, investigators, and FGG experts.
That is a very different reality from assuming the FGG work will stay forever behind the investigative curtain.
From a police-practices standpoint, this is one of the most interesting parts of the Kohberger record.
Othram did one portion of the work.
Then Othram stopped.
Idaho State Police received the information.
Then the FBI continued the work.
The FBI produced a larger SNP profile and conducted additional database searches.
Then the FBI gave the name back to Idaho investigators.
That's a lot of hands in the case.
And potentially a lot of records.
Vendor records.
State police records.
FBI records.
Database search records.
SNP testing information.
Family-tree work.
Analyst notes.
Communications.
Policies.
Different people doing different pieces of the investigation.
That's where cases can get messy.
There may not be one neat report that says:
Here is exactly how we got from the crime-scene DNA to Bryan Kohberger.
Instead, the process may be spread across agencies and vendors.
And once litigation starts, that handoff can become part of the story.
Judge Hippler's later suppression ruling addressed the genealogy databases the FBI searched.
The court found that Othram had searched FamilyTreeDNA and GEDmatch Pro, which permitted law-enforcement searching.
The FBI later searched additional databases, including GEDmatch and MyHeritage.
According to the court, those services purported to prohibit law-enforcement searches at the time.
That became part of Kohberger's constitutional challenge.
The judge ultimately rejected the suppression argument.
He held that any violation of a database's terms of service or an internal DOJ policy did not, by itself, create a Fourth Amendment violation requiring suppression.
That outcome matters.
The FGG evidence survived.
But look at what had to be litigated to get there.
Which database was searched.
What the database rules said.
What DOJ policy said.
What the FBI did.
What the SNP information could reveal.
Whether Kohberger had a protected privacy interest in the process.
That is a lot of courtroom attention for something described operationally as a tip.
This is another place where the distinction between lead generation and downstream evidence gets tested.
Kohberger argued that evidence obtained after the FBI identified him through FGG should be suppressed if the FGG process itself was unlawful.
That included later investigative steps.
The court rejected that argument.
Judge Hippler found no Fourth Amendment violation in the FGG work and also rejected the challenge to the Pennsylvania trash collection.
So the State won.
That part should not get lost.
This is not an article saying Anne Taylor blew up FGG.
She didn't.
The FGG litigation did not result in suppression.
What it did do was force the process into the open.
By January 2025, this was no longer just lawyers filing motions about whether genealogy records were relevant.
The court heard testimony from investigators and experts about the actual FGG process.
The hearing included testimony from Brett Payne, Rylene Nowlin, Matthew Gamette, FBI agent Daniel Hellwig, and defense FGG expert Leah Larkin.
The court heard about Othram's work.
The FBI's work.
The database searches.
The relatives.
The genealogy process.
The trash collection.
The path by which Kohberger became the investigative lead.
Again, the State wasn't planning to introduce the FGG as substantive trial evidence.
It still became testimony.
That's the distinction I think agencies need to understand.
The later STR evidence against Kohberger was extremely strong.
The court cited a statistic that the DNA profile obtained from Kohberger was 5.37 octillion times more likely if Kohberger was the source of the sheath DNA than if an unrelated randomly selected person was the source.
That's the evidentiary DNA.
That does not automatically make everything that happened before it irrelevant.
The defense can still go backward and ask:
How did law enforcement arrive at Kohberger?
Who else was in the genealogy?
What information did the FBI rely on?
What did the vendor do?
What searches were run?
Were any databases used contrary to their stated rules?
What policies governed the process?
What records exist?
That's a different question from whether the final STR comparison is valid.
This is what I keep coming back to.
The final lab report may be solid.
The direct DNA comparison may be solid.
The warrant may be solid.
And the defense may still crawl backward into the FGG work.
That means the ugly parts can matter.
The low matches.
The branch that went nowhere.
The relative who declined a sample.
The point where one vendor stopped and another agency took over.
The database search that became controversial later.
The notes nobody thought would matter.
The family tree with hundreds of innocent relatives on it.
The analyst who made the call that this was the guy worth looking at.
The stuff behind the tip can still become courtroom material.
Kohberger proves that.
Another important discovery point came out of the 2023 order.
The court analyzed whether the FBI's FGG materials were effectively within the prosecution team's discovery obligations.
The court concluded that the FBI was acting as an arm of the prosecution for purposes of that analysis in this case.
That matters when agencies outsource or bring in federal partners.
The fact that another agency or vendor did the work does not necessarily mean the local case file can simply ignore what happened over there.
That becomes especially important when the FGG work is the reason a particular person ended up under investigation.
This is probably the cleanest way to look at Kohberger from the law-enforcement side.
The State won the suppression issue.
The court found no Fourth Amendment violation.
The FGG work was not suppressed.
The trash evidence was not suppressed.
But before getting to that ruling, there were:
discovery motions,
in-camera review,
partial disclosure,
protective orders,
privacy issues involving relatives,
expert review,
database challenges,
standing arguments,
policy arguments,
a suppression hearing,
and a detailed written decision.
That is a lot of litigation around an investigative lead.
So when somebody says:
"Don't worry about the genealogy. It's just a tip."
I think Kohberger gives us a better answer.
Maybe.
But somebody may still ask you to show how you got it.
That is why I use the term forensic genetic genealogy.
If this work is being done in a criminal investigation, there is always a possibility that somebody is going to have to explain it in court.
The genealogy may never be shown to a jury.
The work behind it may still get examined.
And from a police-practices standpoint, that is the part worth thinking about before the case gets there.
I work with law-enforcement agencies on forensic genetic genealogy case review, investigative practices, program development, documentation, training, and the handoff between genealogy work and traditional investigation.
If your agency is already doing FGG, outsourcing it, or trying to build an internal capability, the question isn't just whether the process can generate a name.
It's whether you'd be comfortable explaining how that name was generated if the defense got into the files.
Christine Burke Forensic Genetic Genealogist | Law Enforcement Trainer | Police Practices Expert Genetic Genealogy for Law Enforcement
The Kohberger court records use the term "investigative genetic genealogy" or "IGG." I use forensic genetic genealogy (FGG) when discussing the process in the law-enforcement context because the investigative work may ultimately be scrutinized in court. This article is for law-enforcement education and is not jurisdiction-specific legal advice.
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