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On a Friday in December 1991, seventeen-year-old Jennifer Harbison and her coworker Eliza Thomas, both seventeen years old, were closing up at the frozen yogurt shop where they worked. Waiting for a pickup were Jennifer’s younger sister, 15-year-old Sarah Harbison, and her friend, Amy Ayers, who was 13.

Just before midnight, a inferno at the store attracted firefighters and police, who made a grim discovery: the four teenagers had been tied up, murdered, and showed signs of sexual assault. The configration eliminated most of the forensic clues, with the exception of a bullet casing that had fallen into a gutter and tiny traces of DNA, notably traces beneath Amy Ayers' nails.

The Crime That Stunned Texas

The yogurt shop murders profoundly shook the Texas capital and were branded as one of the best-known unsolved mysteries in America. After years of dead ends and false accusations, the homicides eventually led to a U.S. law approved in the year 2022 that enables loved ones to request unsolved investigations to be reinvestigated.

But the killings stayed unresolved for almost thirty-four years – before this development.

Key Development

Investigators revealed on this past Monday a "major development" powered by new technology in firearms analysis and forensic science, said the city's mayor at a press conference.

Genetic matches suggest Robert Eugene Brashers, who was confirmed after his death as a repeat offender. Further crimes are likely to be added to his record as genetic testing continue to improve and more commonly used.

"The single piece of proof recovered from that scene has been matched to him," said the top law enforcement officer.

The murders isn't closed yet, but this marks a "huge leap", and Brashers is considered the sole perpetrator, police confirmed.

Closure for Loved Ones

Eliza's sister, Sonora Thomas, said that her psyche was fractured when Eliza was killed.

"One part of my brain has been demanding, 'What took place to my sister?', and the remaining part kept saying, 'I'll never learn the truth. I'll pass away without answers, and I have to be OK with that,'" she recalled.

When she learned about this progress in the investigation, "the conflicting thoughts of my brain started coming together," she said.

"I know now the events, and that does ease my anguish."

Innocent Men Exonerated

The news not only bring closure to the loved ones; it also definitively absolves two individuals, who were teens then, who maintained they were forced into giving false statements.

Springsteen, a teenager at the time at the time of the killings, was given a death sentence, and Michael Scott, aged 15 at the time, was sentenced to life. Each defendant said they only confessed following hours-long interrogations in 1999. In 2009, the two were freed after their guilty findings were reversed due to new precedents on confessions without tangible proof.

Prosecutors dropped the case against the two men in 2009 after a DNA analysis, called Y-STR, revealed neither man matched against the DNA samples found at the crime scene.

Scientific Breakthrough

The DNA signature – indicating an mystery suspect – would in time be the crucial element in cracking the investigation. In 2018, the profile was sent for reanalysis because of scientific progress – but a countrywide check to other police departments found no matches.

During the summer, Daniel Jackson working on the case in recently, came up with a thought. It had been since the bullet casings from the cartridge had been submitted to the National Integrated Ballistic Information Network – and in the years since, the registry had undergone major upgrades.

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

The system identified a link. An open homicide case in the state of Kentucky, with a identical pattern, had the same type of shell casing. Jackson and another official consulted the Kentucky detectives, who are continuing to investigate their unnamed case – and are testing materials from a sexual assault kit.

Linking Multiple Crimes

This development got Jackson thinking. Might there exist further clues that might match against crimes in different locations? He thought immediately of the Y-STR analysis – but there was a obstacle. The Codis database is the national DNA database for investigators, but the genetic material from the scene was too fragmented and minimal to enter.

"I said, well, several years have gone by. A growing number of laboratories are performing these tests. Databases are getting bigger. I proposed a national inquiry again," he stated.

He distributed the historic DNA data to law enforcement agencies nationwide, requesting them to check by hand it to their own databases.

They found another match. The profile corresponded precisely with a DNA sample from Greenville, South Carolina – a 1990 murder that was closed with the aid of forensic experts and a celebrated genealogist in 2018.

Identifying the Killer

The genealogist created a genealogical chart for the offender and located a family member whose biological evidence pointed to a close tie – probably a brother or sister. A court official authorized that Brasher's body be exhumed, and his biological samples corresponded against the crime scene sample.

Usually, the genealogist is puts behind her closed investigations in order to work on the next one.

"But I have {not been