Press release - Series
April 8, 2026
INSIDE THE TRAILSIDE KILLER CASE AND ONE WOMAN’S MIRACULOUS SURVIVAL ON ‘IMPACT X NIGHTLINE,’ STREAMING APRIL 9 ON DISNEY+ AND HULU

THURSDAY, APRIL 9
IMPACT x Nightline: “Terror on the Trails” (424) — Streaming on Disney+ and Hulu
Logline: Inside the haunting Trailside Killer case and seven grisly murders. How actress Lisa Rinna’s mom survived a serial killer, and could there be more victims?
Extended Logline:
“IMPACT x Nightline: Terror on the Trails” dives into the Trailside Killer story, who hunted women and couples in the woods, and the clues investigators chased to crack the case. Actress Lisa Rinna shares how her mother, Lois DeAndrade, survived a brutal attack; John Alderson returns to the trail where his sister Anne spent her final moments doing what she loved; retired Marin County public defender Jay Ruskin looks back on his time defending the Trailside Killer David Carpenter in court; and Karen Kilroy remembers the moment she gave police a crucial piece of evidence. Decades after terrorizing the trails, could there still be more victims out there?
The Inside Scoop:
- “IMPACT x Nightline: Terror on the Trails” begins streaming Thursday, April 9, on Disney+ and Hulu.
- The episode features an exclusive interview with John Alderson, brother of victim Anne Alderson, who returns to the Mount Tamalpais State Park trail his sister was murdered on for the first time since her memorial with “IMPACT x Nightline.”
- New interviews include the following:
- Lisa Rinna, daughter of Lois DeAndrade
- Steven Haertle, survivor of serial killer David Carpenter
- Karen Kilroy, former acquaintance of serial killer David Carpenter
- Ana Garcia, ABC News contributor
- Jay Ruskin, retired public defender, Marin County
- Esther Ludlow, host, “Once Upon A Crime” podcast
- Danielle Larock, host, “National Park After Dark” podcast
- Cassie Yahnian, host, “National Park After Dark” podcast
Now in its fourth season, ABC News Studios’ award-winning streaming newsmagazine “IMPACT x Nightline” investigates the topics dominating American culture, stories in the zeitgeist, and conversations around the globe. Eman Varoqua is executive producer.
Media Contacts
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