In May of 1996, a 19-year-old college freshman vanished from her San Luis Obispo university in the middle of the night. When she never returned to her dorm room, what began as a missing-person case quickly gripped California and sparked decades of questions, rumors, and nationwide attention. With recent arrests in the case, investigators would uncover a slew of evidence: from stained soil to horrific video footage taken by the main suspect. This is the murder of Kristin Smart.