How 34-year-old Yogurt Shop Murders of four teen girls who were tied up, stacked on top of each other and shot in the head before being burned is now subject of documentary trying to unravel mystery

Eliza Thomas, Jennifer Harbinson, Sarah Harbinson, and Amy Ayers were killed inside the storage room of the I Can't Believe It's Yogurt shop in Austin on December 6, 1991.