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Washington state jury weighing case of young B.C. couple killed in 1987

Click to play video: 'Trial begins in decades-old murder of B.C. couple'
Trial begins in decades-old murder of B.C. couple
WATCH: (Aired June 10) Trial begins for the man accused of killing a B.C. couple in Washington State in 1987. Kylie Stanton reports – Jun 10, 2019

Jurors in Washington state are weighing whether a trucker killed a young Canadian couple in 1987.

A jury began deliberating Tuesday afternoon in the trial of William Talbott II, the Daily Herald reported.

He wasn’t arrested until last year, when authorities said they used genetic genealogy to identify him as the person who left his DNA on one of the victims.

Prosecutors say on Nov. 18, 1987, 18-year-old Tanya Van Cuylenborg and her boyfriend, 20-year-old Jay Cook, drove a van from their hometown of Saanich, near Victoria, British Columbia, to Seattle for an overnight trip.

When they didn’t return, their families began a frantic search for them, including renting a plane to try to spot the copper-colored Ford van they had been driving.

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About a week later, Van Cuylenborg’s body was found down an embankment in rural Skagit County, north of Seattle. She was naked from the waist down and had been shot in the back of the head.

WATCH: (Aired May 18) Washington cold case arrest: family reaction

Click to play video: 'Washington cold case arrest: family reaction'
Washington cold case arrest: family reaction

Hunters found Cook dead two days later in brush near a bridge over the Snoqualmie River in Monroe, which is about 95 kilometres from where his girlfriend was discovered. He had been beaten with rocks and strangled with twine and two red dog collars, authorities said.

The couple’s van was found in Bellingham, Washington, near a bus station. Van Cuylenborg’s pants were in it; investigators found semen on the hem, and said it matched that on her body.

Tanya Van Cuylenborg and Jay Cook.
Tanya Van Cuylenborg and Jay Cook. BC Crime Stoppers

Snohomish County deputy prosecutor Matt Baldock said in court that their families may never know specifics of what happened. But he argued that the question of who did it was answered.

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Sheriff’s detective Jim Scharf fought back tears on the witness stand as he recalled a phone call from Parabon NanoLabs, which uses a new DNA processing method to extract more information from samples.

With the help of a genealogist, the lab had found a man whose genetic profile matched DNA from a crime scene.

“What was that name?” the deputy prosecutor asked.

“William Earl Talbott II,” Scharf told the jury in Snohomish County Superior Court.

WATCH: (Aired May 18, 2018) Washington state man arrested in cold case murders of B.C. couple

Click to play video: 'Washington state man arrested in cold case murders of B.C. couple'
Washington state man arrested in cold case murders of B.C. couple

The defence suggested Talbott’s semen could have ended up at the crime scenes — on pants in the van, and on Van Cuylenborg — from consensual sex.

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Defence attorney Rachel Forde said police developed “tunnel vision” over the years, clearing people as suspects because their DNA didn’t match the semen.

“They never stopped to consider that perhaps the person who left the DNA was not the murderer,” Forde said.

Jon Scott described his 56-year-old client as a “blue-collar guy” who had worked in construction and as a truck driver and lived a “quiet, unremarkable life.”

Talbott of SeaTac, Wash., chose not to testify.

The gun used to kill Van Cuylenborg was never recovered. Scharf testified that Talbott’s parents lived 11 kilometres from the rural bridge where Cook’s body was dumped.

For closing arguments, a crowd filled every seat in the courtroom gallery and spilled into the aisles.

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