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Back on December 6, 1991, Jennifer Harbison and her coworker Eliza Thomas, both 17, were wrapping up at the yogurt store where they were employed. Remaining for a lift were Jennifer’s younger sister, Sarah Harbison, aged 15, and Sarah’s friend, Amy Ayers, who was 13.

Moments before 12 AM, a fire at the business summoned first responders, who uncovered the tragedy: the four teenagers had been tied up, killed, and showed signs of sexual assault. The configration wiped out the bulk of physical proof, aside from a shell casing that had ended up in a drain and trace amounts of biological evidence, including material beneath Amy Ayers' nails.

The Case That Shook a City

The frozen yogurt shop case profoundly shook the city of Austin and evolved into one of the most infamous unsolved mysteries in America. After years of investigative roadblocks and mistaken arrests, the murders ultimately led to a federal law enacted in 2022 that allows families of the deceased to ask for unsolved investigations to be reviewed.

However the murders remained unsolved for nearly 34 years – before this development.

Significant Progress

Investigators announced on this past Monday a "major development" driven by modern methods in firearms analysis and genetic testing, said the city's mayor at a press conference.

Forensic clues indicate Robert Eugene Brashers, who was identified after his death as a repeat offender. Additional killings may be added to his record as genetic testing evolve further and widespread.

"The only physical evidence recovered from the yogurt shop has been matched to him," said the top law enforcement officer.

This investigation remains open, but this marks a "significant advance", and the suspect is believed to be the lone killer, authorities said.

Families Find Answers

Eliza's sister, a therapist, shared that her thoughts were divided when Eliza was killed.

"One half of my mind has been screaming, 'What took place to my sister?', and the other half kept repeating, 'I will never know. I'll go to my grave unaware, and I must accept that,'" she stated.

After discovering of this breakthrough in the case, "the conflicting thoughts of my mind began merging," she noted.

"Now I understand the events, and that relieves my anguish."

Wrongful Convictions Overturned

This development not simply bring resolution to the victims' families; it also definitively absolves two men, minors when arrested, who insisted they were pressured into admitting guilt.

Robert Springsteen, then 17 years old during the crime, was given a death sentence, and Scott, aged 15 at the time, was received a life sentence. Each defendant stated they admitted involvement after hours-long interrogations in 1999. In the following decade, they were freed after their guilty findings were thrown out due to legal changes on admissions without physical evidence.

Prosecutors dropped the prosecution against the two men in 2009 after a forensic examination, referred to as Y-STR, showed neither suspect matched against the genetic material recovered from the yogurt shop.

The Investigation Advances

This genetic marker – suggesting an unidentified male – would ultimately be the key in resolving the murders. In recent years, the genetic data was reexamined because of improved methods – but a national search to law enforcement agencies yielded no results.

This past June, Daniel Jackson working on the investigation in 2022, came up with a thought. It had been since the firearms evidence from the shell casing had been submitted to the National Integrated Ballistic Information Network – and in the interim, the registry had undergone major upgrades.

"The software has improved dramatically. In fact, we're using three-dimensional imaging now," he said at the news event.

There was a hit. An open homicide case in the state of Kentucky, with a identical pattern, had the identical kind of cartridge. Investigators and a cold case expert spoke to the local investigators, who are actively pursuing their open file – including testing materials from a rape kit.

Linking Multiple Crimes

This development prompted further inquiry. Might there exist any other evidence that might correspond to investigations elsewhere? He thought immediately of the DNA profile – but there was a challenge. The Combined DNA Index System is the federal genetic registry for police, but the genetic material from the scene was insufficiently intact and scarce to upload.

"I said, well, several years have gone by. Additional facilities are doing this. Systems are expanding. Let's do a national inquiry again," the detective stated.

He circulated the historic genetic findings to investigative units around the country, requesting them to check by hand it to their internal records.

There was another hit. The genetic signature matched perfectly with a sample from another state – a killing that occurred in 1990 that was closed with the aid of forensic experts and a well-known researcher in 2018.

Building a Family Tree

The expert built a genealogical chart for the murderer from that case and identified a kinship connection whose biological evidence indicated a immediate family link – probably a brother or sister. A magistrate approved that Brasher's body be exhumed, and his DNA corresponded against the evidence from the yogurt shop.

Typically, the genealogist is can move on from closed investigations in order to concentrate on the new mystery.

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