20/20: The After Show – Exclusive Interview: The Yogurt Shop Murders | Podcast

Yogurt Shop Murders: A Deep Dive into a 30-Year Cold Case

Key Concepts:

• Cold Case Unit: A specialized law enforcement team dedicated to investigating unsolved or stalled criminal cases.
• Y-STR DNA Profiling: A DNA analysis technique focusing on the Y chromosome, used to identify male contributors to a sample.
• NIBIN (National Integrated Ballistic Information Network): A database used to connect firearms to crime scenes based on ballistic evidence (shell casings, etc.).
• False Confessions: Admissions of guilt that are not factually true, often resulting from coercive interrogation techniques or psychological vulnerabilities.
• MO (Modus Operandi): The method of operation a criminal uses to commit crimes.
• Nostradamus Effect: The tendency to find patterns or connections in random data, potentially leading to misinterpretations in investigations.

I. The Crime and Initial Investigation (1991-2017)

On December 6th, 1991, four teenage girls – Sarah Harbison (17), Jennifer Harbison (15), Eliza Thomas (17), and Amy Heirs (13) – were brutally murdered at a yogurt shop in Austin, Texas. The girls were found bound, sexually assaulted, and shot. The shop was subsequently set on fire, seemingly to destroy evidence. The case quickly became a source of heartbreak and frustration for the Austin community and law enforcement.

The initial investigation was plagued by false confessions from four young men – Robert Springsteen, Forest Welburn, Michael Scott, and Maurice Pierce. Springsteen and Scott were even convicted based on these confessions, with Springsteen initially sentenced to death (later commuted) and Scott receiving a life sentence. However, these convictions were overturned due to legal technicalities regarding the admissibility of co-defendant testimony. All charges against the four men were eventually dismissed. The case remained unsolved for over two decades, leaving the families of the victims repeatedly victimized by the justice system.

II. Renewed Investigation and the Cold Case Unit (2017-2022)

In 2017, Mindy Montford, a former Assistant Texas Attorney General with a personal connection to the case (having grown up in the affected neighborhood), joined the investigation. Montford’s involvement coincided with the establishment of a statewide Cold Case Unit within the Texas Attorney General’s office, spurred by the success of teams like the Golden State Killer Investigation team and a desire to provide resources to smaller jurisdictions.

Montford and Detective Dan Jackson focused on re-examining existing evidence and utilizing modern forensic technology. A key piece of evidence was a male DNA profile (Y-STR) obtained from a vaginal swab taken from Amy Heirs. Despite previous attempts, this profile had not yielded a match. They also revisited the case of Maurice Pierce, who had initially implicated the other three suspects, noting inconsistencies in his original statement and the inconclusive gun testing.

III. The Breakthrough: DNA, Ballistics, and Robert Brashier (2022-2023)

The investigation gained momentum through two key developments:

1. National DNA Database Search: A renewed request was sent to crime labs across the country to manually search their databases for a match to the Y-STR profile. This resulted in a hit to an unsolved 1998 homicide and arson in Lexington, Kentucky. The Kentucky case involved a similar MO – a female victim tied up, sexually assaulted, and a fire set to cover the crime.
2. NIBIN Database Match: A shell casing recovered from the yogurt shop was entered into NIBIN (National Integrated Ballistic Information Network). This led to a connection with a case involving Robert Brashier, who had been arrested in Texas shortly after the yogurt shop murders for possessing a stolen vehicle and a 380 caliber handgun.

These leads converged on Robert Brashier. Investigation revealed a pattern of violent crimes committed by Brashier across multiple states. His daughter, interviewed separately, described him as a seemingly normal father, highlighting the deceptive nature of serial offenders.

IV. The Aftermath and Legacy (2023-Present)

Although Brashier died in a 1999 standoff with police, identifying him as the perpetrator provided closure for the victims’ families after decades of uncertainty. Montford and Jackson actively contacted other law enforcement agencies to investigate potential unsolved cases linked to Brashier. Montford emphasized the importance of continued investigation to uncover the full extent of his crimes.

The case highlights the power of persistence, the evolving capabilities of forensic science (particularly DNA technology and ballistic databases), and the importance of dedicated cold case units. It also underscores the devastating impact of false confessions and the emotional toll on victims’ families. The families, while relieved to have answers, also expressed the difficulty of reconciling the new information with decades of previous beliefs and investigations.

Notable Quotes:

• Mindy Montford: "I just it really broke my heart for them [the families] and I'd always had an interest in the case."
• Heirs Family (regarding the possibility of another trial): "I don't think I could survive another trial."
• Mindy Montford: "We have focused on [the DNA profile] for so long that why aren't we going back and looking at all the evidence and seeing okay now it's you know 2022 2023 maybe technology has changed enough that we could go back and retest some of those items."

This case serves as a stark reminder of the enduring pain caused by unsolved crimes and the unwavering dedication required to bring justice, even decades later.