Murder of Elizabeth Roberts

Elizabeth "Lisa" Ann Roberts, born Elizabeth Ann Elder, was born November 3, 1959, to Mary Guignard and Stanley Elder in Hood River, Oregon, and later adopted out to Troy and Dolly Roberts of Roseburg, Oregon at age 2.[6] She was adopted out after her birth parents divorced, and her mother remarried and gave birth to two biological half-siblings of Roberts, Ken Christensen and Carol Holen.[3] Roberts had 2 adoptive sisters, Tonya Roberts and Lynn Roberts. Tonya, who was 10 when Elizabeth disappeared, described her relationship with Elizabeth as "I looked up to Lisa as my big sister, who would spend time with me and play with me downstairs [...] we had a really good bond because we were both adopted."[5] Roberts grew up in Roseburg, Oregon and attended Roseburg High School. Roberts was noted as having a strong interest in music and played the flute in her school band.[4]

Roberts was last sighted 15 days after leaving home, on August 9, 1977. Roberts was seen by multiple people, thumbing for a ride as she walked south along Bothell-Everett Highway near Silver Lake.[4] Roberts was picked up by 20-year-old David Martin Roth in his Chevy Nova, who had been headed towards the lake before encountering Roberts. Roth shared a beer with her and drove to a hidden spot near Mariner High School. Roth propositioned Roberts for sex, which she refused, saying that she wanted to go home.[5] Roth offered Roberts a peacock feather, then strangled her with a bungee cord.[9] Roth then dragged the body into the bushes, where he emptied 7 bullets from the clip of his .22 caliber rifle into her head, disfiguring her face.

Roberts' body was found by blackberry pickers on August 14, 1977, in brambles off the roadside in unincorporated south Everett.[10] She had been dead for 5 days in the summer climate, and decomposition levels further obscured identification.[11] Investigators determined the victim was 5'10, weighed 155 pounds, and had light reddish-brown hair.[5] She carried no identification, purse, or driver's license, and was dressed in a pastel tank top with blue, green, and pink stripes, denim cutoffs, blue and white Mr. Sneaker brand tennis shoes in a boy's size 7, a Timex watch with a yellow face and a leather band which she wore on her left wrist.[10] Her pants pockets contained 17 cents, an open pack of Marlboro, and an empty plastic bag.

On August 13, 1977, 4 days after Roberts' murder, David Roth was arrested after police received a call about a different man waving a rifle in a park outside Gold Bar. On the way to the scene, officer Fred Vanderpool stopped Roth for a traffic violation on US route 2, whose Chevy Nova smelled of cannabis.[12] The contents of the Chevy Nova contained clips with 59 rounds, several bags of cannabis, a bundle of peacock feathers, and a loaded .22 caliber Marlin rifle.[12] Roth was arrested briefly on a weapons charge and then released on August 15, 1977. Roberts' body had not yet been connected to Roth by this time.[5]

On August 15, 1977, Roth confided in a friend that he had killed a hitchhiker. The friend then called the police on August 29, 1977, who began to build a case against Roth.[11] Roth was arrested at a Port Orchard apartment on January 18, 1979.[12] He was tried and found guilty of first-degree murder on November 9, 1979, and sentenced to 26 years in prison.[5][4] Roth was released in 2005, after serving his full sentence.[9] Roth returned to Everett, and in 2008, cold case investigators asked for his help in identifying the girl he had killed in 1977. Roth agreed to assist the investigation but continued to assert that he had not asked her name, which was standard practice about hitchhikers.[13] Roth expressed regret over her death, quoted as saying, "I've always wondered how to alleviate someone's sorrow. I don't know what you can actually say to someone who you've killed their loved one [...] I think I would try to convince them I'm no longer the person that did that and I've learned to value life."[5] He also expressed his wish to atone properly to her family. Roth died of cancer on August 9, 2015, 5 years before Roberts was identified.[4]

Roth was the younger brother of convicted murderer Randy Roth, who killed his fourth wife in 1991 and is also suspected of killing his second wife in 1981.[12]

Roberts was identified on June 16, 2020. The identification was made by a team of 16 genealogists working on the case pro bono.[5] Detective Scharf, who was still the lead detective on the case, had been on the case for 12 years when the identification was made. Snohomish County Medical Examiner Lead Medical Investigator Jane Jorgensen had been on the case for 3 years when the identification was made. The positive identification of Roberts was announced to the public on June 25, 2020, by Dr. Matt Lacy, Snohomish County Chief Medical Examiner.[1] Her case is the oldest case of unidentified remains in Snohomish County to be solved with genetic forensics.

Roberts' case is notable for being one of the first cold cases in the world to be solved using DNA extracted from rootless hair. Due to the DNA of Roberts' bones being too deteriorated to successfully extract a complete profile, the profile was completed using new developments in rootless hair sequencing, methods pioneered by paleogenomics expert Dr. Richard "Ed" Green of the University of California in Santa Cruz.[7] The hair used to identify Roberts was recovered from strands left on clothing of hers that had been kept in an evidence locker.[4] Having never been buried, the DNA in the hair was of relatively good quality. Dr. Green managed to acquire Roberts' genetic profile using an algorithm he spent 2 years refining.[2][16]

The team that identified Roberts was led by Barbara Rae-Venter and her Firebird Forensic Group, using public genetic genealogy websites.[4] Upon taking over, Rae-Venter stated that there was no useful DNA in previous samples from the remains. Rae-Venter then called Dr. Green onto the case.[8] After sufficient DNA had been extracted from the hair, Rae-Venter and her team turned to public genealogy websites such as Ancestry.com to search for matches that could prove a relationship, and from there lead to Jane Doe's identity.[13]

After identification, Roberts' remains were exhumed again and sent to Hood River, Oregon, for a memorial service and burial in a family plot at Pine Grove Cemetery.[3][4]