Woman Found Stabbed to Death With Scissors at Local Bookstore

Murder Files Unsealed · Sep 13, 2026 · 51m · transcript

In 2010, Sherry Black was discovered brutally murdered in her Utah bookstore by her husband and an employee. The investigation remained a cold case for nearly a decade until advances in genetic genealogy helped detectives identify a suspect named Adam Antonio Spencer DeRobo. After police matched his DNA to evidence found at the scene, DeRobo was arrested and eventually confessed to the killing. During his interrogation, he described the attack as a spontaneous outburst fueled by childhood trauma and personal frustrations. He ultimately pleaded guilty to aggravated homicide and was sentenced…