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During the 6th of December, 1991, seventeen-year-old Jennifer Harbison and her coworker Eliza Thomas, each aged 17, were finishing their shift at the dessert shop where they worked. Staying behind for a ride home were Jennifer’s younger sister, 15-year-old Sarah Harbison, and her friend, 13-year-old Amy Ayers.

Just before midnight, a fire at the business drew firefighters and police, who found a horrific scene: the young victims had been restrained, fatally attacked, and showed indicators of assault. The fire eliminated the bulk of physical proof, except for a shell casing that had rolled into a drain and trace amounts of genetic material, notably traces found in her nail scrapings.

The Murders That Rocked Austin

The frozen yogurt shop case traumatized the Texas capital and evolved into one of the most notorious unsolved mysteries in America. Following decades of false leads and wrongful convictions, the killings ultimately helped prompt a federal law enacted in recent years that permits loved ones to petition cold cases to be reviewed.

But the murders continued to baffle investigators for almost thirty-four years – until now.

Significant Progress

Police authorities revealed on this past Monday a "significant breakthrough" powered by modern methods in ballistics and genetic testing, announced the city's mayor at a media event.

Forensic clues point to Robert Brashers, who was identified after his death as a repeat offender. More murders may be added to his record as DNA analyses become more advanced and widespread.

"The single piece of proof recovered from the yogurt shop corresponds directly to him," stated the city's police chief.

The case hasn't reached conclusion, but this is a "huge leap", and the individual is considered the lone killer, authorities confirmed.

Healing Begins

The sister of Eliza Thomas, a therapist, shared that her psyche was fractured following Eliza was killed.

"One portion of my brain has been demanding, 'What happened to my sister?', and the remaining part kept repeating, 'I will never know. I'll go to my grave unaware, and I have to be OK with that,'" she said.

When she learned about this breakthrough in the case, "both sides of my brain began merging," she noted.

"Finally I comprehend the truth, and that does ease my pain."

Innocent Men Exonerated

The breakthrough not only bring peace to the loved ones; it also completely clears two suspects, teenagers at the time, who maintained they were forced into admitting guilt.

Robert Springsteen, a teenager at the time during the crime, was sentenced to death, and Scott, who was 15, was received a life sentence. The two said they only confessed following hours-long interrogations in the year 1999. In the following decade, both men were freed after their guilty findings were reversed due to court rulings on admissions absent physical evidence.

The district attorney's office dropped the prosecution against Springsteen and Scott in the same period after a DNA analysis, called Y-STR, indicated neither individual matched against the DNA samples found at the crime scene.

Scientific Breakthrough

The DNA signature – suggesting an unidentified male – would ultimately be the decisive factor in solving this case. In 2018, the DNA profile was sent for reanalysis because of scientific progress – but a countrywide check to investigative bodies yielded no results.

In June, an investigator assigned to the case in recently, had an idea. Time had gone by since the firearms evidence from the shell casing had been entered to the national ballistic system – and in the years since, the registry had undergone major upgrades.

"The system has advanced significantly. In fact, we're talking like 3D stuff now," Jackson said at the news event.

There was a hit. An unresolved killing in the state of Kentucky, with a similar modus operandi, had the matching variety of shell casing. Jackson and another official spoke to the local investigators, who are actively pursuing their unnamed case – and are testing materials from a forensic kit.

Connecting the Dots

The new lead got Jackson thinking. Could there be additional proof that might match against crimes in different locations? He thought immediately of the Y-STR analysis – but there was a challenge. The national DNA registry is the federal genetic registry for investigators, but the yogurt shop DNA was not complete enough and scarce to enter.

"I suggested, well, it's been a few years. A growing number of laboratories are conducting this analysis. Systems are expanding. We should conduct a nationwide search again," the detective explained.

He sent out the long-standing DNA data to law enforcement agencies across the United States, requesting them to check by hand it to their own databases.

There was another hit. The genetic signature matched perfectly with a genetic evidence from another state – a killing that occurred in 1990 that was closed with assistance from a genetic genealogy company and a celebrated genealogist in 2018.

Genetic Genealogy Success

The genealogist developed a family tree for the murderer from that case and located a relative whose DNA sample pointed to a direct relationship – probably a brother or sister. A magistrate ordered that the suspect's remains be exhumed, and his DNA aligned against the forensic proof from Austin.

Typically, the genealogist is puts behind her resolved crimes in order to focus on the new mystery.

"Yet I have {not been