When a woman's body is discovered at an Anaheim trash facility, a dedicated detective makes a promise to her mother to get justice. She doesn't know that search will bring her face to face with a serial killer. Keith Morrison reports.

Keith Morrison catches up with Julissa Trapp in Dateline’s ‘After the Verdict’ series. They discuss what she’s been up to since appearing on Dateline, including her promotion to sergeant and her interview with the second of the two serial killers featured in the episode.Now with the cold case unit, Sgt. Trapp reveals details about a 40-year-old murder that was recently solved and, as she approaches retirement, tells Keith about the legacy she hopes to leave behind. Available exclusively to Dateline Premium subscribers. https://dateline.supportingcast.fm/listen/dateline-nbc-premium/after-the-verdict-good-evil