On the morning of December 30, 1999, a trailer home in rural Oklahoma went up in flames. Of the four people inside, two were shot dead, and the other two—16-year-old best friends—vanished. Writer Jax Miller, a former junkie, spent four years embedded in the tiny town investigating the case. Her experience is captured in a gripping and dark new true crime book called Hell in the Heartland. We talk about why she learned about the mystery and about herself.