this is "nightline." tonight, maternal obsession. the mother claiming her daughter was terminally ill. >> she's in intestenal failure. >> even though olivia was not medically ill, her life was pure hell. >> authorities accusing the mom of murder, saying it was an attention-seeking lie. plus, they're back. >> when this is all over, i am going to kill you. >> sarah connor saving the world from a dark fate again with help from the terminator. >> she's really a tough cookie.

it was really great to have her back. >> their iconic roles throughout the years. >> i'll be back. >> the trail-blazing duo all pumped up for another judgment day. >> i'll be back. >> and halloween treats. the spooky costumes that are just out of this world. >> hello, everybody. >> but first the "nightline" five.

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good evening. thanks for joining us. it's an obscure psychological disorder, called munch syndrome by proxy. one mother's actions went one step too far. >> reporter: it was one of her last wishes. 6-year-old olivia gants riding along with the police. >> we don't know how much longer she has. >> reporter: the celebration of a young life, believed to be ravaged by a terminal illness. her mother, kelly renee turner bringing the local community together to make the last months of her daughter's life special. >> here's my bucket list. >> reporter: but now authorities say it was all a lie. the only truly sick person, the

mother, kelly, who's now under arrest and accused of murdering her daughter. authorities say it was a devious crime all playing out in public. like the time her daughter became an honorary firefighter. >> she said i want to battle with batman. we're going to battle captain hook. >> reporter: and she got that wish. seen here on the cbs denver affiliate. >> a dream is a wish your heart makes. >> reporter: olivia died in 2017, just 7 years old. her obit we're said the was a rare disease. but her mother is charged with receiving fraudulent payments of half a million dollars and theft associated with a gofundme account. >> there's a money trail to show all the money and benefits that she basically sole, allegedly on behalf of her sick daughter.

>> reporter: police said they were tipped off when turner allegedly lied about a second daughter having cancer. >> the first child dies. the mother then induces illness on yet another child so she can t continue this fraud, continue getting attention, continue getting somebody cin loving and knowledgeable about certain types of diseases. >> reporter: investigators exhumed olivia's body and found no evidence of the illnesses her mother claimed she had. >> the second doctor, the pathologist said this daughter did not die of intestinal failure. as a matter of fact, there was no evidence from the autopsy that many of the symptoms the mother had claimed ever existed. >> reporter: authorities also say turner spontaneously brought up munchausen by proxy. where a caregiver makes a child sick on purpose, but denied she suffered from it. >> these mothers, because they

virtually spend 24/7 with their child, the community looks at them like a hero. look at this woman. she's taken on this very sick child, spends day and night with her, trying to make her better, takes her to doctors, hospitals, et cetera. >> reporter: the indictment paints a picture of the length she went to to convince the world her daughter was dying. >> this indictment reads like a horror novel of what was done to this child. it literally made me sick. >> reporter: according to the charges, turner provided doctors with a false medical history, that included autism, seizures and cancer. multiple doctors say they told turner her daughter was not terminally ill and that she repeatedly ignored their advice. in recent years, case of munchausen by proxy have played out on the small screen. from hbo's "sharp objects." >> it's good for you.

>> reporter: to netflix's "the politician." >> you've been poisoning me. >> reporter: to hulu's "the act." based on the real-life story of gypsy rose blanchard. >> my mother is the best friend e. >> reporter: the wheelchair-bound 23-year-old charged with killing her mother dee dee. >> many people had not heard of munchausen by proxy until they heard the case of gypsy rose blanchard. another little girl whose mother had tortured her for years. >> reporter: my colleague, amy robach, sat down with the real gypsy for her first interview in prison. >> did you hate your mother at that point? >> i didn't hate her. >> you wanted her dead. >> yes, but it was not because i hated her. it was because i wanted to escape her. >> reporter: for years, gypsy and her mother were supported by charitable foundations, living like local celebrities, spending time being flown around country

going to ball games, galas and disney world, all because her mother convinced others gypsy suffered from several severe illnesses. >> what medical conditions did you believe you suffered from? >> leukemia. asthma. both vision and hearing impaired. muscular dystrophy. and seizures. >> did you always know you could walk if you wanted to? >> yes. >> she told you you had to stay in a wheelchair when you could walk. how did she convince to you do that? >> i was so young, so i mean, looking after her so much and believing that she knows best, i didn't question it. >> did you believe you were sick? >> there are certain illnesses that i knew i didn't have. i knew that i didn't need the feeding tube. i knew that i could eat. and i knew that coy walk. but i did believe my mother when she said that i had leukemia.

for a long time, i believed that we best friends. and then when i was younger, she was my best friend. >> she was your only friend. >> yes, other than my stuffed animals. and so i thought that she was a great mother, no complaints. we got along so perfect. >> reporter: but as gypsy got older, she became curious about life as a normal teenager. she says she even tried running away, but once her mother found her, there were consequences. >> she physically chained you to the bid. >> she physically chained me to the bed and put bells on the doors. >> did you ever consider in a public place if you stood up out of your wheelchair and walked dee dee's fraud would be completely exposed? >> i honestly didn't think about that. >> it never crossed your mind? >> no. >> so, instead of planning an elaborate escape, you planned a murder. >> yes. >> reporter: as it turns out,

not only could gypsy walk, she was never even sick at all. >> the only thing that i have wrong with me is i have a little bit of a lazy eye. >> reporter: it was later uncovered that dee dee had faked extensive amounts of paperwork for gypsy's treatments. abc news reviewed medical records that showed she was treated by at least 150 doctors that resulted in a lifetime of prescriptions and procedures, including multiple gastrointestinal operations, eye surgeries and the removal of her saliva saliva salivary glands. >> cat scans, blood tests, and were you healthy. so how would she get the doctors to understand when none of it was true? >> she had a very sweet personality. very convincing. she would call it southern charm, and she would use her southern charm to get them to be friendly. and get on their good side.

>> reporter: gypsy pled guilty to second degree murder for killing her mother and was sentenced to ten years in prison. >> you're actually a prisoner now. how do the two compare? >> in some ways they're the same. but now i'm so much more freer. the prison i was living in before with my mom, like i couldn't walk. i couldn't eat. i couldn't have friends. over here i feel like i'm freer in prison than living with my mom. because, now i'm allowed to just live like a normal woman. >> prison isn't normal. >> no, not for most. but for me it is. >> reporter: prison may become the new normal for kelly turner as well. if found guilty for first degree murder, she could be sentenced to life in prison without parole. >> i would say that mommy is caught rid handed as it relates to olivia. what will be the defense?

>> reporter: but ar uger's medical condions were legitimate. >> the community that supported little olivia for all this time is devastated. i think they feel a mixture of being scammed, but also at least some small degree of happiness that they gave this little girl olivia some joy. even though olivia was not medically ill, her life was pure hell. at least the community gave her some degree of joy. >> turner's next court appearance is tomorrow. up next, sarah connor and the terminator, prepped and primed. how they plan to save mankind from a dark fate yet again. >> i'll be back.

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annoepidemic fueled by juul use with their kid-friendly flavors. san francisco voters stopped the sale of flavored e-cigarettes. but then juul, backed by big tobacco, wrote prop c to weaken e-cigarette protections. the san francisco chronicle reports prop c is an audacious overreach, threatening to overturn the ban on flavored

products approved by voters. prop c means more kids vaping. that's a dangerous idea. vote no on juul. no on big tobacco. no on prop c. you know, they promised they'd be back, and they are. linda hamilton and arnold arno schwarzenegger ready to save the world again in their latest "terminator" movie. we caught up with the duo, what they have to say about the franchise and their past and present missions. >> my name is sarah connor. i hunt terminators. >> it's fantastic. it just gets richer every single time. >> reporter: she's the action

movie pioneer, whose sarah connor blazed trails and bullets through the first two terminator movies. now 28 years later. a 63-year-old linda hamilton is ripped and ready. >> i'll be back. >> reporter: for "terminator, dark faith." >> i really enjoyed this one. it's kind of wonderful to reprise, but reprise from a big gap, you know, and to be able to bring back so much more that has just happened as a function of age and experience. >> reporter: fittingly enough, sarah connor gets the no-nonsense introduction she deserves. >> we rehearsed the crap out of it. because it's really the first impression, isn't it? so we worked those weapons so that i would be smooth. i mean, just every minute

detail. >> you even get the great line as you leave, how about that? she took your line, arnold. >> i'll be back. >> you will have to pay dearly for that one. >> reporter: they're both back. for "terminator dark fate." so it's been a minute, so to catch you up. >> i arnold schwarzenegger. >> do solemnly swear. >> reporter: long before he was elected governor of california, before she starred in "beauty and the beast." >> her name is kathryn. >> reporter: before he helmed titanic and became oscar's king of the world, yes, 35 years ago. 1984's "the terminator" and state-of-the-art sci-fi vaulted james cameron onto the movie industry a-list. >> i'll be back. >> reporter: that catch phrase and his implacable terminator lifted him out of the conan films and made him a bankable

movie star for the next decade. >> it kind of made my career, because really, it launched my action career, i would say. after that all this stuff started happening. and i cannot take any credit that i've created anything. people say wow, you're such a self-made man. i would say no. >> reporter: but the terminator's hero was linda hamilton. somehow staying alive to save all human kind from future annihilation. >> the fact that i was wearing that hair shocks me that she ever became neighbor. if you look at her and go ooh. >> hasta la vista, baby. >> reporter: for the huge hit, "judgment day" in 1991. for sarah connor, waitress to warrior, her muscled up physique which she still remembers revealing to arnold. >> i was like, arnold, look what

i did, i ripped my shirt off. i had a running bra on. i was always working out. and i was like, arnold, look what i did! >> and cameron says why are you staring at her? do you see how ripped she is? i see veins popping out of her biceps. >> reporter: sequels did not feature hamilton or cameron who were married. cameron imagined terminator dark fate as a t-2 descendant. >> i was stunned that cameron was interested in doing it again. i was thinking maybe bring linda back. that would be fantastic. >> i wanted it to compare to the first two films that were james c cameron's. didn't want to do anything that was less than that, to bring it back in as strong a way as possible. it's not pretty.

not pretty at all. she's not much of a fan of human kind, either. so she's a woman alone. >> it was really great to have her back on this project. >> we're book ends. we fit together just like that. or that. >> reporter: now 72, schwarzenegger reportedly began shooting the movie just three months after open heart surgery. as new characters for mckinzie davis and gabriel luna, hamilton looks back with satisfaction on her return. >> i never felt so encompassed with love and creativity ever as an actor. my affection for arnold and just my ladies were a revelation. there was a lot of hugging. i know it sounds so girly, but boy, that's what kept us alive. >> arnold, we don't want to ruin your image, but tim told us that

you cried after you saw the movie. >> i don't know. it just creeped up on me. i didn't think i would ever walk away with tears running down my eyes. >> reporter: meanwhile, as she comes to the aid of natalia reyes, fans long-invested in sarah connor cheer. >> to be able to bring that to the screen and to call on it and then still have to be a bad-ass. it's fantastic. i am pleased that women are getting to stand up and be counted and be strong and strong and feminine, you know. we don't have to look like men to be strong. and, you know, it's all, all going according to plan. >> reporter: for "nightline," chris connelly in beverly hills movie hits the screens tomorrow. next, the smallest trick-or-treaters putting a spell on you.

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and finally tonight, frightfully sweet and ready for treats. >> reporter: it's halloween and getting spooky for the first time. the teeniest patients at advocate children's hospital in illinois. precious premies in costume. two peas in a podg s proud parents with their nebraska corn husker. but also joining in on the fun? sisters, showing off their out-of-this-world fashion. ellie, the legendary moonwalker and charlie, the lunar module.

and for those who don't have kids, man's best friends stepping in on capitol hill. the former first lady, a happy go lucky shark for the world champions, and one hot dog looking for a sweet treat. that's the sweetest of halloweens. that's "nightline." you can always catch our full episodes on hulu. thanks for staying up with us, goodnight, america.