New Lead In 26 Year Old Cold Case Of Murdered Federal Way Girl
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February 24, 2018
CLICK TO ENLARGE Suspect as seen through Parabon DNA phenotyping.
CLICK TO ENLARGE. Sara Yarborough
(KING COUNTY, WA.) – The King County Sheriff’s office says new information has been developed regarding the identity of a suspect in the murder of a teenage girl in Federal Way decades ago.
Sixteen year old Sarah Yarborough was last seen alive on the morning of December 14th, 1991 leaving her residence to go to Federal Way High School to participate in a dance team competition.
She was found dead on the school campus later that morning.
King County Sheriff’s Office detectives have recently sought the services of Parabon NanoLabs, a DNA technology company in Virginia that specializes in DNA phenotyping.
This is the process of predicting physical appearance and ancestry from unidentified DNA evidence.
“Using DNA evidence from Sarah’s murder Parabon was able to produce trait predictions for the associated person of interest,” says Sgt. Cindi West. “Individual predictions were made for the suspect’s ancestry, eye color, hair color, skin color, freckling, and face shape. By combining these attributes of appearance a composite was produced depicting what the suspect may have looked like at 25 years old with a body-mass index (BMI) of 22.”
Those default values were used because age and BMI cannot be determined from DNA.
“It is important to note that the composites are scientific approximations of appearance based on DNA, and are not likely to be exact replicas of appearance,” adds Sgt. West.
The results of the phenotyping DNA test can also determine kinship between DNA samples out to six degrees of relatedness. Detectives are hoping this new information will help generate leads in the case.
At upper right are general predictions of a suspect’s basic appearance type obtained from Parabon for the suspect at the ages of 18, 25 and what he may look like today.
If you have information about this suspect or the crime you’re asked to please call the King County Sheriff’s Office at 206-296-3311 or you can email firstname.lastname@example.org