Texas AG's Office launching statewide Cold Case Unit Texas AG's Office launching statewide Cold Case Unit The Texas AG's Office is launching a statewide Cold Case Unit to help local law enforcement agencies with almost 19,000 unsolved homicides. "In Texas [there] are around 19,000 cold cases and you think about the faces behind those cold cases you can’t afford not to do something," said Mindy Montford, who serves as senior counsel. Each day, Shawn and Angie Ayers carry the face of a cold case victim with them: Shawn’s little sister Amy Ayers. In 1991 Amy was one of four teenage girls killed in Austin’s infamous "I can’t believe it’s Yogurt!" shop murders. The girls had been shot in the head, bound and gagged with their own clothes. Some had been raped. Two of the girls worked at the shop. Amy was just 13.