'20/20' PRESENTS TWO-HOUR DOCUMENTARY ON CARY STAYNER, THE YOSEMITE SERIAL KILLER, 20 YEARS AFTER REIGN OF TERROR

Features First Prime-Time TV Interviews With FBI Agents Who Took Cary's Confession and Exclusive Interview With an Intended Victim Who Reveals Herself for First Time to '20/20'

'20/20' Airs Friday, Jan. 25 (9:00 - 11:00 p.m. EST), on ABC

"20/20" features first prime-time TV interview with former FBI Agent Jeff Rinek, who took Cary Stayner's shocking confession.

Cary Stayner made headlines in 1999 after he terrorized Yosemite National Park, murdering four women within six months. The "20/20" documentary dives into Cary's past, the horror that he inflicted and features the first prime-time TV interview with former FBI Agent Jeff Rinek and the first TV interview with former FBI Agent John Boles, who together took Cary's shocking confession. The documentary also includes an exclusive interview with Lenna, one of Cary's original intended victims he described in his confession, who is revealing herself for the first time since the murders to "20/20." "20/20" airs Friday, Jan. 25 (9:00 - 11:00 p.m. EST), on ABC.

"20/20" reports the chilling story about Cary's younger brother Steven, who was kidnapped as a child and escaped after seven years in captivity and how Steven's disappearance may have impacted Cary's behavior. It also includes exclusive, never-before-broadcast audio of Cary's confession and footage from the ABC News archives. The documentary features exclusive interviews with Trisha Houtz, a former Yosemite Cedar Lodge worker who knew Cary, and Des Kidd, former Yosemite medical director who discovered one of the victims. "20/20" also has interviews with Mike Marchese, childhood friend of Cary; Martin Purdy, Cary's childhood friend; Christine Hanley, former AP reporter who followed the Yosemite case closely; Pat Lunney, former Merced PD detective who investigated Steven's disappearance; Alan Stenback, former neighbor of Ken Parnell, Steven's captor; and Lori Duke, Steven's high school girlfriend while he was being held captive.

Cary worked as a handyman at Yosemite Cedar Lodge and mostly kept to himself. While working at the hotel, he brutally murdered tourists Carole Sund, her daughter Juli Sund, and friend Silvina Pelosso, and then five months later, park naturalist Joie Ruth Armstrong. When he was eventually brought in for questioning, he confessed in detail about how he killed his victims. He was sentenced to death and is currently on death row at California's San Quentin State Prison.

Steven was kidnapped from his home in Merced, California, at age 7. While in captivity, he was abused by captor Kenneth Parnell. At age 14, Steven escaped with Timothy White, another victim of Parnell's. Upon his return home, Steven was hailed as a hero, and his disappearance became the subject of books and a movie. He later married, had two children and tragically died in a motorcycle accident at age 24.

The Yosemite serial killer documentary event is part of eight weeks of two-hour "20/20" programming featuring brand-new interviews with key players in some of the biggest newsmaker stories in recent American history. Each documentary takes a look at these cases through a modern lens, challenges original perceptions and sheds new light on each story.

"20/20" is anchored by David Muir and Amy Robach. David Sloan is senior executive producer.