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Parabon agreed to upload Individual A's DNA to GEDmatch and called in genetic genealogist CeCe Moore. The Golden State Killer's DNA had been uploaded to GEDmatch, a genetic database that allows users of various consumer test kits to share and compare their DNA.ĭet.
Joseph James DeAngelo aka The Golden State Killer.Įrin Moriarty: Did a little light bulb go over your head at that moment?ĭet. The man responsible for numerous rapes and murders was finally apprehended after 43 years using genetic genealogy. …He is believed to be the so-called Golden State Killer.
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GAYLE KING | "CBS THIS MORNING": Investigators in California say DNA evidence led them to one of the country's most notorious serial killers. Then, in 2018, a stunning arrest in California opened new doors for law enforcement. Parabon was hired to use Individual A's DNA to create a composite sketch which gave Scharf some clues as to what the suspect could look like at the ages of 25, 45 and 65, but he still didn't have a name. Jim Scharf: They gather all that information, and they end up making a Snapshot … of what an individual with all of those traits might look similar to. The man police believed killed Tanya Van Cuylenborg and Jay Cook left behind a forensic calling card, says Lisa Collins, but still managed to elude capture for years.Īnd then in 2017, Detective Jim Scharf heard about an innovative tool developed by Parabon NanoLabs that uses DNA evidence to predict the genetic traits of an unknown suspect. Lisa Collins: We had those original semen samples - from the pants and then from Tanya's body … trying to figure out who this sample may belong to … that was the tedious and hard part. According to Detective Scharf, they were part of the killer's rape-murder kit.
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The sample matched the DNA found inside Tanya's body, and would later be known as "Individual A." Investigators and forensic scientists had four crime scenes scattered over three counties, but few clues.īut the only evidence that connected all four crime scenes were plastic zip ties found near Tanya and Jay's bodies, under the porch, and inside the van. Jim Scharf: They found that there was semen on Tanya's pants … and when they examined the semen, they learned that it couldn't be left from Jay. Inside the van, they found what would ultimately be the most important piece of evidence: the black pants Tanya had been wearing.ĭet. Inside the van, investigators found what would ultimately be the most important piece of evidence: the black pants Tanya Van Cuylenborg had been wearing. Jim Scharf: There was a palm print on the back of the van that … they believed hopefully belonged to the suspect. Investigators believe the killer wore it to avoid leaving fingerprints. A bullet casing found on the hillside near Tanya's body matched those bullets collected at the tavern in Bellingham, but a gun was never found.Ī surgical glove was discovered under the porch. Investigators and forensic scientists had four crime scenes scattered over three counties, but few clues. And it was … believed at the time … that it was probably a serial killer or an ex-convict.īut finding that predator would be challenging. … this was a person who was a real predator. … But we had no idea still about where was Jay? Where was the van? … How did this happen? Why did it happen?ĭet. John Van Cuylenborg: It's such a crushing feeling … that all of a sudden you see her lying there. Later that evening, John had to identify his sister's body. Jim Scharf: She rolled down the hill … It was a quick execution. Tanya had been shot in the head at close range.ĭet. So, it obviously looked like a rape-murder. … and her bra was pushed up over her breasts. Jim Scharf: She wasn't wearing any pants or panties. Tanya's body was found at the bottom of ditch in rural Skagit County, some 80 miles north of Seattle.ĭet. On November 24, six days after the couple disappeared, John's worst fears were confirmed. The site were Tanya Van Cuylenborg's body was found. I mean, the obvious things in terms of them being in hospital or something or just simply with a flat tire somewhere, all those more innocent explanations were pretty much vanishing. John Van Cuylenborg: Something was gravely wrong.