When Margaret Brown moved to Austin in 1996, she was greeted by the smiling faces of four young girls, peering down at her from faded billboards all over town. Highlighted in a shock of red, just underneath their black and white portraits was the question, “WHO KILLED THESE GIRLS?”

In December of 1991, nude the bodies of Eliza Thomas, 17, Amy Ayers, 13, and sisters Jennifer Harbison, 17, and Sarah Harbison, 15, were found inside a North Austin yogurt shop. They had been shot, three of them execution-style, and the store had been set ablaze. The efforts to extinguish the fire destroyed much of the physical evidence, leaving behind a crime scene that would haunt and confound the community for years to come.

The subsequent investigation was marked by twists and turns — false confessions,

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