20/20 takes a deep dive into the tragic and mysterious death of Toni Henthorn in an all-new episode airing Friday, February 28, 2025, at 9:01-11:00 p.m. Est on ABC and streaming the next day on Hulu.

Toni, an accomplished ophthalmologist with a seemingly perfect life, was hiking in Rocky Mountain National Park with her husband, Harold, to celebrate their 12th wedding anniversary when she tragically fell to her death from a 160-foot cliff. The initial assumption was a simple accident, but the investigation soon revealed startling clues that suggested a far darker truth. As the National Park Service and FBI investigated her death, they uncovered years of deception, raising suspicions about a second, equally mysterious death.

In this gripping 20/20 episode, GMA3 co-anchor Eva Pilgrim reports on the case, featuring an exclusive interview with Toni’s daughter, Haley Bertolet. For the first time since her mother’s death, Haley shares her personal story,...