Thomas' sister, Eliza Thomas, was 17 years old when she was murdered alongside three other teenage girls-13-year-old Amy Ayers, 17-year-old Jennifer Harbison, and Jennifer's 15-year-old sister Sarah-in Austin, Texas, in 1991. To be fair, Sonora was only 13 when her sister was murdered, and her family, burdened by grief, never openly talked about what happened to Eliza. Still, memory, as Brown expertly captures in his series, is a really tricky thing.