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During the 6th of December, 1991, Jennifer Harbison and Eliza Thomas, both 17, were wrapping up at the dessert shop where they were employed. Staying behind for a ride home were Jennifer’s younger sister, Sarah Harbison, aged 15, and her friend, Amy Ayers, who was 13.

Shortly before the clock struck twelve, a inferno at the store drew first responders, who made a grim discovery: the four girls had been restrained, murdered, and showed evidence of sexual violence. The fire wiped out most of the forensic clues, with the exception of a bullet casing that had fallen into a gutter and trace amounts of genetic material, notably traces found in her nail scrapings.

The Case That Shook a City

The yogurt shop murders traumatized the Texas capital and evolved into one of the most infamous unsolved mysteries in the nation. Following decades of investigative roadblocks and wrongful convictions, the murders eventually helped prompt a federal law enacted in recent years that permits loved ones to petition cold cases to be reinvestigated.

Yet the killings stayed unresolved for over three decades – until now.

A Major Breakthrough

Police authorities revealed on this past Monday a "important advance" driven by new technology in ballistics and genetic testing, announced the local leader at a press conference.

The evidence indicate Robert Brashers, who was named posthumously as a repeat offender. More murders are likely to be added to his record as genetic testing continue to improve and widespread.

"The only physical evidence found at that scene has been linked to him," stated the top law enforcement officer.

The murders hasn't reached conclusion, but this is a "huge leap", and the suspect is considered the sole perpetrator, officials confirmed.

Families Find Answers

The sister of Eliza Thomas, a therapist, said that her psyche was fractured after the tragedy occurred.

"One portion of my mind has been demanding, 'What happened to my sister?', and the remaining part kept insisting, 'I'll never learn the truth. I will die not knowing, and I must accept that,'" she stated.

When she learned of this development in the investigation, "those two parts of my thinking began merging," she said.

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

Mistaken Arrests Corrected

This development not only bring peace to the victims' families; it also fully exonerates two men, teenagers at the time, who insisted they were forced into giving false statements.

Springsteen, then 17 years old when the murders occurred, was given a death sentence, and Scott, a 15-year-old then, was received a life sentence. The two said they admitted involvement after hours-long interrogations in 1999. In 2009, they were released after their convictions were thrown out due to legal changes on confessions lacking forensic proof.

The district attorney's office dropped the case against the two men in 2009 after a forensic examination, known as Y-STR, indicated neither individual corresponded against the samples recovered from the murder site.

Scientific Breakthrough

This genetic marker – indicating an unknown man – would ultimately be the crucial element in solving this case. In 2018, the profile was reexamined because of scientific progress – but a nationwide inquiry to investigative bodies yielded no results.

During the summer, an investigator working on the case in 2022, considered a new approach. It had been since the bullet casings from the cartridge had been submitted to the national ballistic system – and in the years since, the registry had seen substantial enhancements.

"The software has improved dramatically. I mean, we're dealing with 3D stuff now," Jackson said at the media briefing.

They got a match. An open homicide case in another state, with a comparable method, had the matching variety of cartridge. The detective and another official met with the law enforcement there, who are continuing to investigate their open file – and are processing samples from a forensic kit.

Linking Multiple Crimes

The new lead prompted further inquiry. Could there be additional proof that might correspond to cases in other states? He thought immediately of the DNA profile – but there was a obstacle. The Combined DNA Index System is the federal genetic registry for law enforcement, but the evidence from Austin was not complete enough and minimal to submit.

"I said, well, time has passed. Additional facilities are performing these tests. Registries are growing. Let's do a countrywide check again," he stated.

He distributed the years-old Y-STR results to police departments nationwide, asking them to manually compare it to their own databases.

A second connection emerged. The profile matched perfectly with a sample from a city in South Carolina – a killing that occurred in 1990 that was closed with the aid of a genetic genealogy company and a celebrated genealogist in 2018.

Identifying the Killer

The expert developed a family tree for the South Carolina killer and found a family member whose biological evidence suggested a immediate family link – almost certainly a brother or sister. A judge ordered that the suspect's remains be dug up, and his DNA matched against the evidence from the yogurt shop.

Usually, the genealogist is able to set aside closed investigations in order to focus on the new mystery.

"Yet I have {not been