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During a Friday in December 1991, Jennifer Harbison and Eliza Thomas, both seventeen years old, were finishing their shift at the frozen yogurt shop where they were employed. Staying behind for a ride home were Jennifer's sister, 15-year-old Sarah Harbison, and her friend, Amy Ayers, who was 13.

Just before midnight, a fire at the store attracted first responders, who made a grim discovery: the four girls had been bound, killed, and showed evidence of sexual violence. The fire eliminated nearly all evidence, with the exception of a shell casing that had fallen into a gutter and trace amounts of genetic material, including material beneath Amy Ayers' nails.

The Murders That Rocked Austin

These horrific killings profoundly shook the community in Austin and evolved into one of the most infamous cold cases in the United States. After years of false leads and mistaken arrests, the homicides eventually contributed to national legislation signed in 2022 that enables families of the deceased to ask for cold cases to be reviewed.

Yet the murders continued to baffle investigators for almost thirty-four years – before this development.

A Major Breakthrough

Law enforcement officials revealed on Monday a "major development" made possible by new technology in ballistics and forensic science, stated the local leader at a press conference.

Forensic clues suggest Robert Brashers, who was identified after his death as a serial killer. Further crimes could be attributed to him as DNA analyses become more advanced and broadly applied.

"The sole forensic clue found at the yogurt shop has been linked to him," explained the city's police chief.

The murders remains open, but this represents a "major step", and Brashers is considered the only attacker, officials confirmed.

Healing Begins

A family member, Sonora, shared that her psyche was fractured following the tragedy occurred.

"One half of my brain has been yelling, 'What occurred to my sister?', and the other half kept repeating, 'I will never know. I'll pass away without answers, and I have to be OK with that,'" she stated.

Upon hearing of this breakthrough in the case, "both sides of my thinking started coming together," she explained.

"Finally I comprehend the events, and that does ease my suffering."

Wrongful Convictions Overturned

The breakthrough not simply bring closure to the loved ones; it also completely clears two men, teenagers at the time, who insisted they were forced into giving false statements.

Springsteen, who was 17 during the crime, was sent to death row, and Michael Scott, aged 15 at the time, was sentenced to life. Both men said they gave confessions after marathon interviews in the late 1990s. In 2009, they were released after their convictions were overturned due to new precedents on admissions lacking forensic proof.

Legal authorities abandoned the prosecution against Springsteen and Scott in the same period after a forensic examination, known as Y-STR, showed neither individual corresponded against the samples left at the crime scene.

Scientific Breakthrough

This genetic marker – pointing to an unknown man – would in time be the crucial element in solving this case. In 2018, the DNA profile was sent for reanalysis because of technological advancements – but a nationwide inquiry to law enforcement agencies returned no genetic matches.

This past June, the lead detective working on the case in recently, considered a new approach. It had been since the bullet casings from the spent round had been entered to the NIBIN database – and in that time, the system had been significantly improved.

"The software has improved dramatically. I mean, we're using three-dimensional imaging now," Jackson commented at the press conference.

There was a hit. An open homicide case in Kentucky, with a similar modus operandi, had the matching variety of bullet casing. Investigators and a colleague consulted the law enforcement there, who are actively pursuing their open file – which involves analyzing evidence from a forensic kit.

Connecting the Dots

This development made the detective wonder. Could there be additional proof that might match against investigations elsewhere? He thought immediately of the genetic testing – but there was a challenge. The Combined DNA Index System is the federal genetic registry for investigators, but the genetic material from the scene was too fragmented and limited to enter.

"I said, well, several years have gone by. More labs are conducting this analysis. Registries are growing. We should conduct a countrywide check again," he stated.

He sent out the long-standing Y-STR results to law enforcement agencies across the United States, instructing them to check by hand it to their own databases.

There was another hit. The DNA pattern corresponded precisely with a genetic evidence from a city in South Carolina – a homicide from 1990 that was closed with help from forensic experts and a celebrated genealogist in 2018.

Building a Family Tree

The genealogist built a genealogical chart for the murderer from that case and identified a family member whose genetic material suggested a close tie – probably a close relative. A magistrate authorized that the deceased individual be exhumed, and his genetic material matched against the forensic proof from Austin.

Usually, she is puts behind her closed investigations in order to concentrate on the following case.

"Yet I have {not been