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On the 6th of December, 1991, Jennifer Harbison and Eliza Thomas, both seventeen years old, were wrapping up at the dessert shop where they worked. Waiting for a ride home were Jennifer’s younger sister, Sarah Harbison, aged 15, and her friend, Amy Ayers, who was 13.

Just before midnight, a fire at the business drew first responders, who made a grim discovery: the four girls had been bound, fatally attacked, and showed indicators of assault. The fire destroyed nearly all evidence, except for a bullet casing that had rolled into a drain and trace amounts of genetic material, including evidence found in her nail scrapings.

The Crime That Stunned Texas

The yogurt shop murders profoundly shook the Texas capital and were branded as one of the most notorious unsolved mysteries in the United States. After years of investigative roadblocks and false accusations, the murders eventually contributed to national legislation signed in the year 2022 that enables loved ones to request unsolved investigations to be reviewed.

Yet the murders continued to baffle investigators for nearly 34 years – up to this point.

A Major Breakthrough

Investigators revealed on this past Monday a "important advance" made possible by new technology in bullet matching and forensic science, announced the city's mayor at a media event.

Forensic clues point to Robert Brashers, who was identified after his death as a multiple murderer. Additional killings could be added to his record as forensic technology evolve further and more commonly used.

"The sole forensic clue recovered from that scene has been linked to him," said the city's police chief.

The murders isn't closed yet, but this is a "significant advance", and Brashers is believed to be the only attacker, police stated.

Closure for Loved Ones

The sister of Eliza Thomas, Sonora, said that her thoughts were divided following Eliza was killed.

"One half of my mind has been screaming, 'What occurred to my sister?', and the other half kept insisting, 'I'll never learn the truth. I will die not knowing, and I have to be OK with that,'" she recalled.

When she learned of this development in the investigation, "the conflicting thoughts of my mind started melding," she explained.

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

Innocent Men Exonerated

The news not simply bring closure to the victims' families; it also fully exonerates two suspects, teenagers at the time, who claimed they were forced into giving false statements.

Springsteen, then 17 years old at the time of the killings, was given a death sentence, and Scott, a 15-year-old then, was given life imprisonment. Both men said they admitted involvement after hours-long interrogations in the year 1999. In the following decade, they were freed after their verdicts were reversed due to new precedents on statements without physical evidence.

Prosecutors abandoned the charges against the defendants in the same period after a DNA analysis, called Y-STR, showed neither man aligned against the genetic material left at the yogurt shop.

Modern Technology Solves Case

The Y-STR profile – indicating an unidentified male – would in time be the key in cracking the investigation. In 2018, the profile was sent for reanalysis because of scientific progress – but a nationwide inquiry to investigative bodies returned no genetic matches.

This past June, an investigator handling the investigation in 2022, came up with a thought. Several years had passed since the firearms evidence from the spent round had been entered to the National Integrated Ballistic Information Network – and in the years since, the registry had seen substantial enhancements.

"The system has advanced significantly. I mean, we're dealing with 3D stuff now," the detective stated at the press conference.

There was a hit. An unresolved killing in Kentucky, with a comparable method, had the matching variety of cartridge. The detective and a cold case expert met with the local investigators, who are actively pursuing their unnamed case – including processing samples from a sexual assault kit.

Linking Multiple Crimes

This development prompted further inquiry. Was there additional proof that might correspond to crimes in different locations? He thought immediately of the DNA profile – but there was a problem. The Combined DNA Index System is the national DNA database for police, but the genetic material from the scene was insufficiently intact and limited to enter.

"I suggested, well, it's been a few years. A growing number of laboratories are doing this. Registries are growing. Let's do a national inquiry again," Jackson stated.

He distributed the long-standing DNA data to police departments across the United States, requesting them to check by hand it to their local systems.

A second connection emerged. The DNA pattern corresponded precisely with a DNA sample from another state – a killing that occurred in 1990 that was resolved with assistance from a DNA firm and an expert in genetic genealogy in 2018.

Genetic Genealogy Success

The researcher created a family tree for the murderer from that case and located a kinship connection whose biological evidence indicated a immediate family link – probably a brother or sister. A judge approved that Brasher's body be dug up, and his biological samples aligned against the evidence from the yogurt shop.

Typically, this expert is can move on from resolved crimes in order to focus on the new mystery.

"But I have {not been