Recent New York Times coverage describes the identification of Wendy Stephens, the last victim of the Green River Killer identified and the youngest - at only 14 years old.
In 2020, the DNA Doe Project, on behalf of King County Sheriff’s Office, in Seattle, WA, enlisted Astrea Forensics to perform DNA extraction of the 37-year old remains.
In the labs, DNA was extracted from 100 milligrams of a tooth (upper premolar) and 100 milligrams of a femur shaft. The tooth and bone yielded 8.5 and 20.6 nanograms of DNA, respectively. As described in the NYT article, the samples went on to be sequenced, genotyped, eventually identified via investigative genetic genealogy by members of by the DNA Doe Project team.
“The way Wendy was identified”, said Detective Jensen, “I never would have believed it was possible 10 years ago. And now we’re doing it”.