Washington, USA | Advanced DNA analysis and forensic genetic genealogy have helped identify a man whose skeletal remains were discovered in a shallow grave in Washington State in 1980. After remaining unidentified for more than 46 years, the individual has been identified as Jack Ashley Brooks Jr., born on March 10, 1939.
The skeletal remains were discovered on October 6, 1980, near the former Hurns Shake Mill on Concrete Sauk Valley Road, close to Marblemount in eastern Skagit County, Washington. The Skagit County Sheriff's Office investigated the discovery but could not establish the man's identity.
Investigators estimated that the individual was between 40 and 55 years old and approximately 5 feet 4 inches to 5 feet 9 inches tall. He had short, receding brown hair and no natural teeth, although he was believed to have worn dentures. Investigators also observed evidence suggesting a possible bone graft.
The case was subsequently registered in the National Missing and Unidentified Persons System (NamUs) under case number UP13290.
Advanced DNA Sequencing Reopens the Case
In August 2023, the skeletal remains were submitted to Othram, a forensic laboratory based in The Woodlands, Texas, to explore whether advanced DNA technology could establish the individual's identity.
Scientists successfully developed a DNA extract from the remains and employed Forensic-Grade Genome Sequencing to generate a comprehensive single nucleotide polymorphism (SNP) profile.
The resulting genetic profile was then examined by Othram's forensic genetic genealogy team. Through genetic genealogy analysis, researchers developed investigative leads that were subsequently provided to law enforcement authorities.
These leads enabled investigators to conduct further enquiries, ultimately resulting in the positive identification of the previously unidentified man as Jack Ashley Brooks Jr.
Role of Forensic Genetic Genealogy
Forensic genetic genealogy combines advanced DNA analysis with genealogical research to identify individuals through genetic relationships with potential relatives. It has increasingly become an important investigative technique in resolving unidentified human remains cases and long-standing cold cases.
In this investigation, genome sequencing and SNP profiling provided the genetic information necessary to generate new leads after conventional investigative efforts had failed to establish the man's identity.
The casework costs were supported by NamUs, a national programme funded and administered by the National Institute of Justice and managed through a contract with RTI International.
According to Othram, this marks the 51st publicly announced identification in Washington State achieved with the assistance of its technology.
The identification demonstrates how advances in forensic DNA technology and genetic genealogy can help restore identities to unidentified individuals, even decades after their remains are discovered.