♪ ♪ i ain't even takin' on torso this is "nightline." tonight, evil in eden. a tale of two brothers, heroism and horror, one the survivor of a kidnapping, the other a serial killer around yosemite national park. the brother in the back ground, suddenly thrust into the spot light. plus, the last lions, when the hunters become the hunted. now the conservni sounding the alarm to save the real-life "the lion king"s. sho. apollo 11, landing it like you've never seen it before. but first, the "nightline"

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different paths. yosemite, california, one of the most stunningly beautiful places on earth. and the backdrop to one of the darkest, most horrific stories of two brothers. one who was kidnapped for seven years, the other who would become a serial killer. >> is this sanctuary would turn out to be the very setting where kerry's murderous demons would be unleashed. >> reporter: it began with a kidnapping weeks before christmas, 1972. steven is qu steven is kidnapped by kenneth parnell. >> kenneth parnell stops the car and goes to a pay phone and tells steven, i i just smoke your parents, they no longer want you. >> he said you're going to be my son. he kept giving him this cough syrup to sedate him. >> steven stainer had a new father figure and it was kevin

parnell who by day was his father and by night was his rapist. >> reporter: parnell moves around with steven, settling in a small california town about five hours north of steven's hometown of mercer. >> parnell told him his name was going to be dennis parnell. and he enrolled him in school. >> reporter: more than five years have gone by, but dennis parnell has not forgotten he's actually steven stainer. his family has not forgotten him either. his older brother kerry deeply affected. >> kerry was very upset. maybe he had some guilt, because i think he was supposed to be with his brother. >> reporter: kerry shows signs of disturbing behavior. >> he had a compulsion of trying to get close to women or be sexual with them but was unable to develop any interpersonal relationships with any women. >> reporter: after seven years with steven, parnell starts looking for a new, younger boy. in february 1980, he pays a high

school kid to help him kidnap 5-year-old timothy white. >> steven watched timmy suffer from this separation from his family for two weeks and decided, finally, that he had to do sk about it. >> reporter: when parnell goes to work, steven hitchhikes with timothy to the town of ukiah, going directly to the police station. >> but when he arrives at that police station, he says something that will be embedded in the public consciousness forever. >> i know my first name is steven. >> that's the title of the book. it became a television movie, and it made steven famous. >> this is steven today. he is holding 5-year-old timothy white. >> steven was a national hero. he returns to merced triumphant. >> good morning, steven and mr. and mrs. stainer, and steven,

how's it feel to be home? >> feels great. >> did you remember your parents well? >> um, they didn't change that much. i recognized them when i got out of the car? >> what about your brothers and sisters? >> they changed a lot. i never recognized either one of them. >> reporter: parnell never sands trial on the kidnapping case. he is caught attempting trying to solicit a 4-year-old boy. he's given a life sentence, dies in prison. steven goes on to work menial jobs, get married and have two children. but then at age 24, steven is quilled while riding a motorcycle. his unexpected death another blow to older brother kerry. >> this rage iskerrhas coue of break downs. one was fairly violent. >> he stated he felt like it

jumping in the truck, driving it through the shop, killing the boss and everybody in the office and then torch beiing the placed that's when i told him he needed to go see a doctor. >> reporter: he enters a mental facility but doesn't stay. he eventually makes his way to yosemite, landing a job as a handy man at the cedar lodge north of the park. he sees an opportunity to act out his sick fantasy. in one of the farthest lodges are three guests, three women, one visiting from argentina. kerry knocks on their door, tells them he's maintenance and needs to fix a leak. >> go to the bathroom, i pulled my out. >> reporter: about a month later, a burned car is found about 60 miles from the cedar

lodge, the remains of two bodies found in the trunk. >> i knew from the very beginning that my girl was there. >> how? >> i don't know. don't ask me. just felt. >> her mother's intuition was sadly correct. it was silvina in the trunk of that kwa that car. >> then the big mystery was, where's julie? >> reporter: investigators get a map in the mail. >> earlier this afternoon, investigators discovered the body of a homicide victim. >> body of julie sun was identified early in the week. >> reporter: authorities would take two brothers with violent back grounds into custody in connection with the murders of the three women. >> people wanted to believe they were the right people in custody. but they weren't the right people. >> he was still working here at

the lodge, still living here on the premises. membef the community. >> didn't really see him as a suspect. he didn't raise alarm bells for anybody. >> reporter: that summer, kerry finds his next victim, 26-year-old joey armstrong, a naturalist working at yosemite, living on the west side of the park. >> seemed like she was alone. >> he gets out his backpack. he's got a gun, he's got duct tape, he's got a knife. he's standing somewhere in this vicinity, and he's talking to her. >> pulled out the gun, put it to her head, she turned around, freaked out. i told her to go inside. >> reporter: authorities soon find joey's body, in a stream near her cabin, decapitated. >> this was just as grisly a

scene as you can possibly imagine. >> he left virtually no evidence at the first scene, he knew he had left a very easy trail for investigators. >> reporter: someone spotted s kerry's distinctive car. >> authorities set up a man huntsz fmanhunt for him yesterday. >> now kerry stainer realizes he has to get out. >> reporter: he ends up at a nudist community where he strikes up a conversation with someone who recognizes him from news story. >> i immediately picked up the phone and called fbi and told them i knew where this person was. >> reporter: the fbi agent task walt disney picking up kerry. >> he stands up and puts his hands up. >> reporter: at the fbi office, kerry starts unraveling. >> he was talking about some very grisly things, as if he was

reading a soup label. >> reporter: stainer confesses to joey's murd, ther, then says has more to share. >> juli was very calm. >> reporter: he describes killing months before. >> i laid out the blanket. i slit her throat. >> reporter: taped confession in hand, the fbi asked kerry to take them to where he carried out the murders. >> with the recovery of the duct tape and the watch and the knife, which was the murder weapon, now we're talking evidence. >> reporter: kerry stainer was found guilty and sentenced to death. >> as far as i know, he's never talked to anyone about the effect steven might have had on his crimes. i'm not sure there is any direct cause and effect. steven could have greown-up normal, happy and healthy and

kerry could have still been a serial killer. >> reporter: now 57, kerry stainer will spend the rest of his life even california's death row. up next, the last lions, the new plan of attack to preserve the circle of life. ♪ be right back. with moderate to severe crohn's disease, i was there, just not always where i needed to be. is she alright? i hope so. so i talked to my doctor about humira. i learned humira is for people who still have symptoms of crohn's disease after trying other medications. and the majority of people on humira saw significant symptom relief and many achieved remission in as little as 4 weeks. humira can lower your ability to fight infections, including tuberculosis. serious, sometimes fatal infections and cancers, including lymphoma, have happened; as have blood, liver, and nervous system problems, serious allergic reactions, and new or worsening heart failure. before treatment, get tested for tb. tell your doctor if you've been to areas

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c . the remake of "the lion king" will be drawing in millions of movie viewers this weekend. but in real life, lions are in peril. here's whit johnson. >> reporter: they are the kings of the jungle.

immortalized in the disney classic "the lion king." >> everything the light touches is our kingdom. we are all connected in the great circle of life. >> reporter: and beautifully remastered in the newly-released live action film. >> everything you see exists together in a delicate balance. >> reporter: but for lions, that delicating real-world balance is under threat. eric and beverly have dedicated their lives to lion conservation and in their lifetimes aloin have seen the population drop from5000 20,000. >> it'a decline. "the lion king" came out and we've seen a drastic reduction since then. >> reporter: the husband-wife

team say many aren't aware of the significant loss. >> when you see lions, you sigh a lot of lions, they cluster. you'll get a pride of lions, there will be 18, 12. people get a sense that there are a lot, but there are not. >> and if you kill one lion, you're not just killing one, there will be a new mail cole c in, but the new male will kill the cubs. >> reporter: while not yet endangered, lions are listed as a vulnerable species, but they say the endanger the designation two be beneficial for the lions' cause. >> it just makes good common sense that if animals are heading in the direction of extinction you back up before they become extinct. >> reporter: they talk about the misunderstanding about t th hunting of big catsssss

shockwaves around the globe. in 2015, a legend lion was killed by american dentist walter palmer on a recreational, big game hunt, launching a firestorm. >> a warning to our viewers, the image you are about to see might be disturbing to some. >> reporter: and last week, that same fire reignited when a trophy-hunting couple posted a picture kissing over a lion they had just slain. >> of the 20,000 lions left on the planet, planet, planet, pla, males, and the males are targeted by trophy hunters. >> reporter: and it's not just the poachers that pose a threat. the general encroachment of humans on their territory has been detrimental to their future survival. >> the goal is to double the lion population, a aut%

have no protection at all. if we requecan increase the protection we can regrow the population. >> reporter: they have been at the forefront of the conservation effort in africa, producing documentaries. in 2009, starting the big cats initiative, alongside national geographic in the hopes of halting the decline of one of the world's most recognizable and beloved creatures. >> it's already imperative to get the right messaging. and if they go through the emotional drive we've gone through, they will want to protect them. >> reporter: now they're hoping another film will bring renewed attention to their cause. the re-imagine nation of the 1994 classic has a new star-studded cast, but its powerful themes remain the same. >> the movie has an incredible spirit. it opens you up. it talks about the struggle of

standing up and fighting for what you love. and it takes you on so many emotional rides. >> reporter: and now, with a call to action. >> disney is partnering with the world's leading lion experts to help defend african wildlife. >> to double the number of lions in the world by 2050. >> reporter: and an opportunity for a new generation to feel an emotional connection to the animal they care so deeply about. >> movies are great influences, that's why a film like lion king does so much more. and next, the moon landing 50 years ago tomorrow. tonight, see it like never before. >> one small step for man, one giant leap for man kind. what about him? let's do it.

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and finally tonight, on this, 50th anniversary of man on the moon, a completely differen

from virtual view, from launch to landing using virtual reality. >> we choose to go to the moon, not because they are easy, but because they are hard. >> one minute, 35 seconds, and the apollo mission, the flight to land a first man on the moon. 40 seconds away from the apollo 11 liftoff. ignition sequence starts, six, five, four, three, two, liftoff. we have a liftoff. 32 minutes past the hour.

>> about 60 miles from the landing site. >> we're now in the approach base. everything looking good. >> altitude 4200. >> over. >> the eagle has landed. >> rocket tranquility, we copy you on the ground. tranquility, be advised there are lots of smiling faces in this room and all over the world. >> okay, neil, we see you coming down the ladder now. >> we see you coming. >> going to step off the land now. >> that's one small step for man, one giant leap for mankind.

>> wow. our thanks to abc news graphic artist kevin bartels for that. that's "nightline." you can always catch our full episodes on hulu. thanks for the company, america, have a good weekend.