Double 1987 murder of Canadian couple 'is cracked by cops using the same genealogy website that led to the arrest of the Golden State Killer'

The Snohomish County Sheriff's Department announced the arrest of 55-year-old William Earl Talbott II

Police suspect Talbott, a Seattle-based truck driver, of murdering of Jay Cook and Tanya Van Cuylenborg on November 18, 1987

All potential leads in the double homicide case has long been extinguished until Thursday, when DNA evidence was examined by Parabon NanoLabs 

Questions still remain as to how Talbott allegedly met the couple or what his motive for the murders may have been

The unsolved double homicide of a Canadian couple in 1987 may have been cracked after police said they used the same genealogy technology that led to the capture of alleged 'Golden State Killer' Joseph James DeAngelo. 

The Snohomish County Sheriff's Department announced the arrest of 55-year-old William Earl Talbott II for the murders of Jay Cook and Tanya Van Cuylenborg on Friday, according to Buzzfeed News.

Police say that on the night of November 18, 1987, Cook, 20, and Van Cuylenborg, 18, drove their van to the Seattle area from British Columbia on a short overnight trip. 

The Snohomish County Sheriff's Department announced the arrest of 55-year-old William Earl Talbott II (Pictured)

Van Cuylenborg's body was found a week later in a ditch in rural Skagit County, Washington, with a subsequent investigation finding that she had been raped then shot to death. 

Cook's body was found two days later and 50 miles away, covered in a blue blanket. Detectives said he was strangled and beaten to death. 

All potential leads in the double homicide case has long been extinguished until  Thursday, when Buzzfeed News reported that DNA evidence from the 31-year-old crime scene was placed in a public genealogy database called GEDmatch. 

Police suspect William Earl Talbott, a Seattle-based truck driver, of murdering of Jay Cook (R) and Tanya Van Cuylenborg (L) on November 18, 1987


Van Cuylenborg's body was found in a ditch in rural Skagit County, Washington, with investigators saying she was raped and shot (Pictured: Cook and his sister Laura Baanstra) 


All potential leads in the double homicide case has long been extinguished until Thursday, when DNA evidence was examined by Parabon NanoLabs (Pictured: Genealogy map)  

The database, controlled by a company called Parabon NanoLabs, consisted of DNA samples from 100 crime scenes and was capable of finding matches with people determined to have familial ties with potential suspects.  

'The significant matches were at about the second cousin level,' Parabon genealogist CeCe Moore told reporters at a press conference following Talbott's arrest.

According to Buzzfeed, Moore had to establish family tress of the great-grandparents of the people whose DNA profiles matched with evidence found at the crime scene.   

Moore then looked into the descendants of these people, where she found that the family trees converged on a couple who had only one son: William Earl Talbott II. 

Moore has since confirmed that Talbott's DNA matches the crime scene sample.

Cook's sister, Laura Baanstra, later told Buzzfeed News that she's hopeful her family will finally get closure after waiting 31 years. 

'Detective work has sure come a long way in 30 years,' Baanstra added. 

Questions still remain as to how Talbott allegedly met the couple or what his motive for the murders may have been. 

'The investigation still has more work to be done,' Snohomish County Sheriff Ty Trenary told reporters. 

Questions still remain as to how Talbott allegedly met the couple or what his motive for the murders may have been (Pictured: Parabon NanoLabs)