On the night of December 6, 1991, what should have been a simple sleepover for four Austin teenagers turned into one of the city’s most haunting tragedies. Amy Ayers, 13, Jennifer Harbison, 17, her sister Sarah Harbison, 15, and Eliza Thomas, 17, were brutally murdered at the "I Can’t Believe It’s Yogurt" shop where two of the girls worked. Their remains were discovered after a fire was reported just before midnight, and the subsequent investigation would stretch on for more than three decades, leaving families and an entire community searching for answers and justice.
First responders arriving at the West Anderson Lane shop that night were confronted not only with flames but with a grisly crime scene. According to ABC News, the girls had been herded to the back of the shop, shot execution-style, and left nude and tied up. There was evidence of sexual assault, and the fire—intentionally set—was meant to destroy evidence of the crime. The families of the victims were notified in the early hours of the following morning, and their lives were forever changed.
Each of the four girls was remembered for her unique spirit. Amy Ayers was described by her family as "just a cowgirl" and "an old soul at an early age," active in the Future Farmers of America. Jennifer and Sarah Harbison’s mother, Barbara Ayres-Wilson, recalled her daughters as "lovely people," with Jennifer enjoying working alongside Eliza Thomas at the yogurt shop. Eliza’s younger sister, Sonora Thomas, remembered her as "very social" and "energetic," someone who was "really into fitness and fashion" and "trying to discover who she was during that period."
The case quickly became one of Austin’s most notorious unsolved crimes, with the city’s sense of safety shattered. As Mindy Montford, a former prosecutor with the Texas Attorney General's Cold Case and Missing Person's Unit, put it in an interview with "20/20": "When the yogurt shop murders took place, it changed Austin forever... [it] really took our innocence away."
Investigators initially focused on four teenage boys: Maurice Pierce, Forrest Welborn, Michael Scott, and Robert Springsteen. Eight days after the murders, Pierce was found carrying a .22 firearm at Northcross Mall—the same mall the two younger victims had visited that night. The weapon was initially suspected to be one of those used in the murders, and Pierce named his three friends as being with him on the night of the crime. However, as defense attorney Amber Farrelly told "20/20," police had "no fingerprints, hair, DNA, nothing that tied any of these boys or anyone to this crime at all... They had, at the beginning, a lot of gossip." After polygraph tests, all four boys were dismissed as suspects, and the case went cold.
The families refused to give up hope. Billboards were erected, tip lines established, and rewards offered, but no concrete leads emerged. Amy Ayers’ father, Bob Ayers, was relentless in his pursuit of justice. "Every chance I got, I went to the police department to make sure they were working on the case," he told ABC News.
In the late 1990s, Texas investigators revisited the case, combing through 33 boxes of evidence. Once again, attention turned to the original suspects. Scott and Springsteen were subjected to lengthy interrogations, ultimately confessing under what they later claimed were coercive conditions. Both men recanted their confessions, insisting on their innocence. Welborn and Pierce continued to deny any involvement. Despite the lack of physical evidence, all four were arrested in 1999. Springsteen and Scott were convicted of capital murder in 2001 and 2002, but their convictions were overturned by 2006 and 2007. The U.S. Supreme Court had ruled that a written confession from one person could not be used against another, and crucially, DNA evidence excluded all four men as contributors to the crime scene.
By 2009, Springsteen and Scott were released, and the charges against Pierce and Welborn were dropped. Still, the shadow of suspicion lingered over their lives for years. Tragically, Pierce died in 2010 during a mental health crisis after being shot by police.
The case languished until 2021, when the Austin Police Department formed a new cold case unit. Detective Dan Jackson took the lead, employing advances in forensic science that had only recently become possible. According to the San Antonio Express-News, Jackson resubmitted a shell casing from the yogurt shop to the National Integrated Ballistic Information Network, linking it to a 1998 Kentucky cold case. He also coordinated a nationwide manual search for unknown DNA collected from Amy Ayers’ fingernails. This Y-STR profile—a marker on the Y chromosome—matched a sample from a South Carolina assault and murder case.
The breakthrough came when the DNA was tied to Robert Eugene Brashers, a serial offender with a violent history across the United States, who had died by suicide in 1999. As Detective Jackson told "20/20": "What are the odds that the same Y profile comes back to a serial killer? And when you start researching this guy, you find out that these are similar crimes, this M.O. is very similar to yogurt shop on more than one occasion." Further DNA analysis from Amy Ayers’ fingernails produced a staggering 2.5 million to 1 likelihood that the genetic material belonged to Brashers, according to South Carolina State Lab findings. Austin Chief of Police Lisa Davis emphasized that none of this would have been possible without recent advances in forensic technology, echoing Jackson’s sentiment: "This is something that could not have happened until 2025. And I’m sorry that it took 34 years for us to get here, but we’re here now and, you know, Amy’s final moments on this earth were to solve this case for us. It’s because of her fighting back."
With Brashers identified as the likely perpetrator, the four original suspects were finally exonerated on February 19, 2026. District Attorney José Garza, who had pursued the exonerations with his Conviction Integrity Unit, offered a public apology: "You were wrongfully accused and you are innocent, and I am so sorry for the role that our office played." Scott, reflecting on his ordeal, said, "For decades, I have carried the burden of wrongful conviction. Every day, I have carried the weight of a crime I did not commit. No court ruling can return the years and the love that were taken from me. But it can acknowledge the truth -- I am not guilty."
The case has been the subject of renewed public interest, with a docuseries, "The Yogurt Shop Murders," debuting on HBO in August 2025, and a special edition of "20/20" airing on ABC on February 27, 2026. The families, while grateful for closure, continue to honor the memory of their daughters. As Barbara Ayres-Wilson poignantly stated, "Jennifer and Sarah and Amy and Eliza did not get to be a part of the community, and the community is less for it because they were really good citizens. They would've made a difference somehow."
After more than three decades of heartbreak, the city of Austin and the victims’ families have finally found some measure of resolution—though the pain and loss will never fully fade.