[This story previously aired on February 5, 2022. It was updated on August 27.]

More than three decades ago, four teenage girls were brutally murdered in an I Can’t Believe It’s Yogurt! shop in Austin, Texas. The horrific crime has haunted their families, the city, and the investigators who chased every lead in the case to a dead end. Could new information finally help solve the case?

“I can see them, I can still see the inside of that place,” John Jones, the first investigator on the case, tells “48 Hours” correspondent Erin Moriarty. “That stuff’s … indelibly burned in my mind.”

The story starts on December 6, 1991, when Eliza Thomas, Sarah and Jennifer Harbison and Amy Ayers were tied up and shot. The yogurt shop was then set on fire. For decades, investigators worked to find suspects. There were eventually arrests and even convictions. But those convictions were overturned, leaving the case unsolved today.

“There is a kind of torture that continues by the fact that it’s unsolved and it’s ongoing,” says Sonora Thomas, who was 13 when her sister Eliza was killed.

“It’s always there,” says Jones.

There may be some positive news, however. A small sample of male DNA was found on one of the victims. With DNA research advancing, investigators hope there will be a match that solves the case.

“Do you believe that there is…