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Back on the 6th of December, 1991, seventeen-year-old Jennifer Harbison and her coworker Eliza Thomas, both 17, were finishing their shift at the frozen yogurt shop where they worked. Remaining for a lift were Jennifer’s younger sister, 15-year-old Sarah Harbison, and Sarah’s friend, 13-year-old Amy Ayers.

Just before midnight, a inferno at the store drew firefighters and police, who found a horrific scene: the young victims had been tied up, fatally attacked, and showed evidence of sexual violence. The configration wiped out nearly all evidence, with the exception of a cartridge that had rolled into a drain and minute samples of biological evidence, among them traces under Ayers’ fingernails.

The Murders That Rocked Austin

The yogurt shop murders deeply affected the community in Austin and evolved into one of the most notorious unsolved mysteries in the nation. Over many years of investigative roadblocks and mistaken arrests, the killings ultimately helped prompt national legislation approved in 2022 that allows loved ones to petition dormant cases to be reopened.

However the murders continued to baffle investigators for nearly 34 years – before this development.

A Major Breakthrough

Investigators revealed on this past Monday a "major development" powered by modern methods in ballistics and genetic testing, said the Austin mayor at a media event.

Genetic matches suggest Brashers, who was identified after his death as a multiple murderer. More murders may be added to his record as genetic testing evolve further and widespread.

"The only physical evidence recovered from that scene has been linked to him," said the head of police.

This investigation hasn't reached conclusion, but this marks a "major step", and the suspect is considered the lone killer, officials confirmed.

Healing Begins

Eliza's sister, Sonora, expressed that her mind was split following her sister was murdered.

"One half of my mind has been screaming, 'What happened to my sister?', and the other part kept repeating, 'It will remain a mystery. I will die not knowing, and I have to be OK with that,'" she stated.

When she learned of this development in the case, "those two parts of my mind began merging," she explained.

"Now I understand the events, and that does ease my pain."

Wrongful Convictions Overturned

This development not only bring resolution to the grieving families; it also fully exonerates two individuals, minors when arrested, who maintained they were coerced into confessing.

Robert Springsteen, a teenager at the time during the crime, was sent to death row, and Michael Scott, aged 15 at the time, was received a life sentence. The two said they admitted involvement following extended questioning in 1999. In 2009, both men were freed after their verdicts were reversed due to new precedents on admissions lacking tangible proof.

Prosecutors abandoned the charges against the two men in 2009 after a genetic test, referred to as Y-STR, indicated neither suspect corresponded against the DNA samples recovered from the crime scene.

The Investigation Advances

The Y-STR profile – pointing to an unidentified male – would in time be the key in solving this case. In 2018, the DNA profile was sent for reanalysis because of scientific progress – but a national search to other police departments returned no genetic matches.

In June, an investigator working on the case in recently, had an idea. Time had gone by since the ballistics from the shell casing had been entered to the national ballistic system – and in the interim, the database had undergone major upgrades.

"The software has improved dramatically. Actually, we're dealing with 3D stuff now," the detective commented at the media briefing.

There was a hit. An unresolved killing in Kentucky, with a identical pattern, had the identical kind of bullet casing. Jackson and a colleague spoke to the local investigators, who are continuing to investigate their unnamed case – and are testing materials from a forensic kit.

Linking Multiple Crimes

The apparent breakthrough got Jackson thinking. Might there exist any other evidence that might correspond to investigations elsewhere? He considered right away of the DNA profile – but there was a challenge. The national DNA registry is the federal genetic registry for police, but the yogurt shop DNA was too fragmented and scarce to upload.

"I suggested, well, time has passed. Additional facilities are doing this. Registries are growing. Let's do a countrywide check again," he said.

He circulated the long-standing DNA data to law enforcement agencies around the country, instructing them to check by hand it to their local systems.

A second connection emerged. The DNA pattern aligned exactly with a sample from another state – a killing that occurred in 1990 that was closed with assistance from a genetic genealogy company and an expert in genetic genealogy in 2018.

Building a Family Tree

The genealogist created a family tree for the South Carolina killer and identified a family member whose biological evidence pointed to a close tie – almost certainly a brother or sister. A judge ordered that the suspect's remains be removed from burial, and his genetic material corresponded against the evidence from the yogurt shop.

Normally, this expert is puts behind her solved cases in order to focus on the following case.

"But I have {not been