Genealogy Sites Have Helped Identify Suspects. Now They’ve Helped Convict One.

EVERETT, Wash. — It has been used to establish greater than 40 homicide and rape suspects in circumstances as a lot as a half-century outdated. It has led to responsible pleas and confessions, together with in a single case the place one other man was convicted of the crime.

Genetic family tree — by which DNA samples are used to seek out family of suspects, and ultimately the suspects themselves — has redefined the reducing fringe of forensic science, fixing the kind of circumstances that hang-out detectives most: the killing of a schoolteacher 27 years in the past, an assault on a 71-year-old church organ participant, the rape and homicide of dozens of California residents by a person who grew to become generally known as the Golden State Killer.

But till a trial this month within the 1987 homicide of a younger Canadian couple, it had by no means been examined in court docket. Whether genetic family tree would maintain up was one of many few remaining questions for police departments and prosecutors nonetheless weighing its use, whilst others have rushed to use it. On Friday, the jury returned a responsible verdict.

“There is no stopping genetic genealogy now,” mentioned CeCe Moore, a genetic genealogist whose work led to the arrest within the homicide case. “I think it will become a regular, accepted part of law enforcement investigations.”

Detective James H. Scharf of the Snohomish County Sheriff’s Office in Washington State took all of six minutes on the stand to explain how a semen pattern collected from one of many sufferer’s clothes led to 2 second cousins of the suspect, after which to the title of the person on trial, William Talbott II.

The protection may have problemd using genetic family tree on privateness grounds, or as a violation of individuals’s proper to manage their private knowledge. Instead, protection attorneys didn’t pose a single query about the approach. After greater than two days of deliberation, the jury convicted Mr. Talbott on two counts of homicide.

Mr. Talbott’s attorneys mentioned they seen genetic family tree as simply one other manner of producing investigative leads. “Police have always used a variety of things to develop tips,” mentioned Rachel Forde, a public defender, in an interview. The brother of one of many victims had even consulted a psychic at one level, she mentioned.

Two days later, Mr. Cook’s body was found 75 miles away. He had been strangled, with a pack of Camel Lights stuffed in his mouth. Their van was found in a third location. But the police had few leads.

By 1994, DNA testing had advanced to the point that semen found on Tanya’s pants could produce a profile. In 2003, Individual A, as he was called, was uploaded to Codis, the FBI’s criminal DNA database.

As the database grew, investigators hoped for a match, in vain. And then in 2017, Detective Scharf heard that there was a way to get more from DNA.

He collaborated with a genealogist to produce a list of possible surnames. None were correct. A forensic consulting firm, Parabon, offered to generate a predictive likeness using DNA. This was not helpful either.

“This is a case I’ve been working on so hard for so long that I never thought it would ever be solved,” Detective Scharf said in an interview.

Parabon offered to help. Detective Scharf, who had been working on the case for more than a decade, was skeptical when the company said that it would have results by the end of the week.

But the call came just a few days later. “He told me we had a match,” Detective Scharf said on the witness stand, starting to choke up when he uttered the name: “William Earl Talbott II.”

Throughout the trial, Mr. Talbott, a solemn man with a gray beard, sat silently between his lawyers. One afternoon, he attempted a smile.

Mr. Talbott is a longtime truck driver who likes to camp. Letters submitted to the court by friends describe him as a kind man who they believe to be incapable of violence. At 56, he had never before been convicted of a crime.

Nor had he ever joined a genealogy site. But two of his second cousins, one on his paternal side and one on his maternal side, had.

Ms. Moore, the lead genetic genealogist for Parabon, used newspaper archives and marriage records to build a family tree back to the two cousins’great-grandparents — and then forward to a particular couple who lived about seven miles from where Mr. Cook’s body was found.

Ms. Moore homed in on their only son, who would have been 24 at the time of the murders.

Next, an undercover officer who was watching Mr. Talbott collected a cup that fell off his truck. Once in custody, Mr. Talbott also provided a cheek swab. Both matched Individual A.

His lawyers did not dispute the match. They have instead fought the idea that the presence of his semen meant that he killed someone.

“1994 is when the DNA profile was developed and from there nothing else mattered; it was complete tunnel vision,” Ms. Forde said in her closing statement on Tuesday. She emphasized that there was no DNA connecting her client to the scene of Mr. Cook’s murder.

Detective Scharf said that years investigating crimes against children had made him doubt any claim that someone is not “the type” to be a perpetrator.

“Everyone in this world has secrets,” he said.

Long before an arrest in the Golden State Killer case in April 2018 made genetic genealogy famous, a small group of experts knew that identifying suspects in criminal cases was possible. But they were divided over whether it was ethically acceptable.

The group — some call them the “genealogy influencers” — debated the issues on blogs and in private forums. Each member has a claim to fame: the first to help an adoptee find her biological mother, the first to identify a body, the first to find a killer’s full name.

Critics said the search was a violation of the user agreement because the case did not involve rape or murder. “GEDmatch can no longer be trusted,” wrote Judy Russell, who blogs under the name The Legal Genealogist.

GEDmatch responded by changing its terms of service yet again, expanding the list of crimes, but allowing searches only of those users who explicitly opted in.

In Texas, another GEDmatch search occurred after the police said they were looking for a sexual predator. But when a genetic genealogist gave the police a name, they charged him with burglary, raising questions yet again about whether the user agreement had been violated.

Another legal wrinkle involves the question of who is injured when the police conduct a database search. In Mr. Talbott’s case, several lawyers said, traditional legal thinking would hold that the cousins’ privacy was violated, not his.

Leah Larkin, who runs The DNA Geek, a company that helps people track down relatives, said that when the police argue that genetic genealogy is like any other tip system, they disregard the vast troves of personal information contained within a single genetic file, such as whether a suspect was born out of wedlock, was the product of incest, or carries genetic diseases.

In many states — including Washington — the police are prohibited from using Codis, the criminal DNA database, to search for relatives.

“It’s a ‘tip system’ that even convicted criminals can’t be forced to participate in,” Dr.. Larkin said. “Yet is being used on innocent people without their knowledge or consent.”

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