Courtesy of HBO

Key Takeaways:

In 1991, the bodies of four teenage girls were discovered after a fire at a Texas frozen yogurt shop. The cold case, known as the yogurt shop murders, has never been solved.

In 2017, Austin police matched a DNA sample from the crime scene with one the FBI had uploaded to a public research database. Similar testing was used to confirm Albert DeSalvo as the Boston Strangler.

More advanced DNA testing completed later excluded the donor of the FBI sample. Investigators continue to search for the perpetrator.

A harmless night inside a frozen yogurt shop in Austin, Texas, turned catastrophic when four teenage girls were murdered and their remains gruesomely burned in a fire. Investigators have pursued answers for the heinous crime, but more than three decades

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