Sylvia Salinas was working behind the counter at her family's grocery store in Galveston, Texas, when she was fatally stabbed through the heart on Halloween day in 1989. The investigation of the 30-year-old's murder turned cold decades ago, but the work of a TV reporter and Salina's great niece has revealed new clues in an old videotape of the crime scene. Nancy Grace looks at the evidence and talks to that niece, Maria Baker, along with Sylvia's brother Derlis Salinas. She is also joined by Houston ABC13 reporter Courtney Fischer, forensics expert Joseph Scott Morgan, and Juvenile Judge & lawyer Ashley Willcott.