tonight on "nightline," vanished. a 6-year-old girl goes missing in the night from her bed without a trace. mystifying police as her anguished parents plead for her return. with hundreds of volunteers still combing the streets, where is little isabel? 1-800-octo-mom. she's back in the spotlight, with a child care controversy and, for a price, you can call and ask her about it yourself. behind the scenes of dial a star, and the big business of cashing in on 15 minutes of fame. the real o'neal. from his on screen love story to

his real one with farrah fawcett, ryan o'neal tells us all about his life, the great love and his very public tv feud with his daughter. >> announcer: from the global resources of abc news, with terry moran, cynthia mcfadden and bill weir in new york city, this is "nightline," april 26th, 2012. >> good evening, i'm terry moran. it been six days since isabel celis went missing, leaving an open window as the only clue. but as police see lead after lead dead end, and hundreds of neighborhood volunteers walk away from their searches empty handed, a community's anxiety only grows. this is the kind of story that strikes fear in the heart of parents across the country. and abc's nall karlinsky brings us the latest. >> reporter: a week ago, 6-year-old isabel celis was here with her teammates. with her friends didn't know, after they left the field friday

night, she would vanish from her bed as her parents allegedly slept next door. a case that has stumped investigators. >> we continue our search. >> reporter: captured the nation's attention. left her parents tormented. >> we are looking -- we're looking for you, isa. we love you. just please, please, to the person or persons who have isabel, tell us your commademan. tell us what you want. >> reporter: there have been other cases where a child was snatched. >> their own bed, like elizabeth smart and bay by lisa irwin. but investigators say when it happens, it is extreme little rare. and more often than not, someone they know. >> pure stranger abductions are around 100 each year. i don't even know of a case truly where there wasn't some connection of a bad guy to the house. >> reporter: and that is why police, now in the middle of the

isabel celis case, are so meticulously building a timeline of what may have happened the night she disappeared. she was last seen going to bed here inside her parents tucson home at 11:00 p.m. last friday. these two neighborhood boys played with her earlier that night. >> she was just a perfect little girl, having fun at a partiful, playing with her friends. >> reporter: smoornding, her mother left for work as a nurse at this hospital and apparently didn't check on her daughter before leaving. >> the morning that her daughter was gone missing, she was here at work very early. >> reporter: by 8:00 a.m., her father was telling police she was missing and that her window was open and the screen was taken out. right away, police launched a massive search, began interviewing neighbors and scouring a three-mile raid yus around the house, almost inch by inch. at a store nearby, this woman found herself face to face with isabel's brother, alone, and searching.

>> he came in and he asked, did you hear anything, we were all sleeping and, you know, we didn't hear anything and next thing you know, she's gone. >> reporter: is this a kidnapping case? >> at this point, we're not prepared to call it a kidnapping yet. >> reporter: police would only call it a suspicious disappearance, ruling nothing out and scouring hours of surveillance camera footage from nearby businesses. they identified 17 sex offenders within three miles. one just five doors down. and the family has two dogs, pets neighbors say barked o eed. a possible key witness that lives right next door came forward with a chilling account. >> i was sleeping in my bedroom. my bed is right next to my window. at 6:30, my dogs were going crazy. i noticed their dogs were going nuts, too. >> reporter: 90 minutes before the first grader was allegedly discovered missing, two men were heard right outside this woman's

window, and just feet from isabel's room. what do you think went on here? >> i didn't hear a little girl's voice, just two males conversing. i think she was comfortable enough with these people to go with them because i didn't hear her. >> reporter: but nearly a week later, police are apparently no closer to finding her, and they still won't officially call it a kidnapping case. >> when children disappear, and there are no suspicious circumumstances that are known, it's then looked upon as possibly a child has wandered off or left voluntarily. then it expands after a number of hours or sometimes days, into foul play. >> reporter: baby lisa irwin, even etan patz, vanished in 1979 and still being investigated, high profile missing children cases never solved. just this week, british authorities pushed for the reopening of the madeleine mccann case, five years after her disappearance, citing new leads and an age progression

photo of what she might look like today. for isabel celis, time can be cruel. as her teammates trade games for vigils, her dev stated parents are all too aware, the investigation isn't making progress like police had hoped. >> we miss you so much and we will never give up. we will never give up looking for you. >> reporter: i'm neal carlin skill for "nightline" in tucson, arizona. >> we'll keep tracking this story. thanks no neal karlinsky for that. just ahead, we switch gears. would you want to call up the octo-mom? now, you can. we go inside dial a star. when we got married. i had three kids. and she became the full time mother of three. it was soccer, and ballet, and cheerleading, and baseball.

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>> announcer: "nightline" continues from new york city with terry moran. >> say you're famous for giving birth to octuplets or maybe for being an ex-reality show star. those lucrative 15 minutes of fame, they can quickly fade into the rear view mirror. so, how can you make a quick buck when you still qualify as tabloid fodder? abc's david wright brings us one company that's found a way to help d-listers cash in, one pricey minute at a time. >> reporter: what if you could call any celebrity you could think of? and actually get them on the phone? >> hello. >> reporter: would you call angelina jolie from "mr. and mrs. smith?" >> you have 48 hours to leave the scene. >> reporter: or anne hathaway from "the devil wears prad day." >> i have to take this. >> reporter: or julia roberts from "pretty woman."

>> hello? >> i told you not to pick up the phone. >> reporter: what would you want to ask them? and crucial question, how much would you will being to pay? stars love interacting with their fans over twitter. and 1-900 numbers are a true money maker. so, why not combine the two? that's the business model for dial a star.com. >> now, there's a website you can go to, you can pay, of course, per minute, to talk to any celebrity that you want, right now, who we have available. >> reporter: that's the catch. so far, a-listers like anne hathaway, angelina julie and julia roberts, not available. with dial a star, you have to scale back your expectations just a bit. this is a business that profits off 15 minutes of fame, even after the 15 minutes should have expired. >> hi, is this nadia? >> hi, david, how are you? >> reporter: that's nad ya suleman. you probably know her as the octo-mom. you know, people call you the

octo-mom. >> yeah, my kids call me the octo-mom. >> reporter: your kids call you that? >> the kids love it, of course. >> reporter: those famous kids are now 3 years old. >> i've had no babysitter for a year and a half now. >> reporter: no babysitting -- >> nothing. >> reporter: for a year and a half? >> right. i've never been happier. say i'm sorry. >> i'm sorry. >> good boy. >> reporter: what is his name? >> this is jonah. >> h >> reporter: how do you have time for the phone calls? >> i will get up in the middle of the night. i have bills i have to pay. and this is an idealistic job. i feel guilty because people are actually spending money to speak to me and i'm not a star. i'm just a mom. >> reporter: she's got her hands full. figure she's cleared 5,000 bucks in six weeks from dial a star. that may be how she paid for the fancy stylist who recently came to her home and then told her

story to tmz, saying she's living in squalor and yet still paid $520 for a hair cut. >> i think maybe my kids were set up because i know i'm a good mom. >> reporter: child protective services has cleared her. exposure has certainly not hurt business. >> still feel guilty they are paying, but it's a wonderful job. >> reporter: and lots of others may profit, too, from this. the stylist, to the tabloids. and, of course, the creator of dial a star. it's like phone sex without the sex. >> right. >> reporter: how many people are using this? >> so far, we have 45 celebrities. not just d-list celebrities or tabloid people, but that's where it started. >> reporter: it started with gina rodriguez, a former adult film actress who found life after porn managing reality show stars. >> we're not discriminating. it's really just anyone who has been famous for something that

somebody might want to talk to. >> reporter: prolong your 15 minutes at $20 a minute. >> right. >> reporter: and your 15 minutes can add up fast. >> definitely. >> reporter: you can get to both of lindsay lohan's parents. i'm intrigued at the pricing. lindsay's mom commands a bigger fee than her dad. >> right. >> reporter: what gives? >> they get to choose their own pricing per minute. dina wanted $25 a minute. shell's busy. and michael is a little bit cheaper. >> reporter: is this tila? >> yes, it's really me. >> reporter: that's tila tequila, model and tv personality. no doubt you remember her from the first season of "penalants dance off." are you getting a lot of calls? >> yeah, it's fun. >> reporter: what do they want to know? >> they freak out for a little bit and usually ask about

relationship advice. lots of advice. >> reporter: she's had a lot of experience, dating men and women. >> reporter: do you get calls from men and women or mostly men or what? >> both, but a lot of females, actually. they want to make out with me and they're not shy at all. it's like girls gone wild. >> reporter: the busiest star? apparently that's danielle staub. she made $18,000 her first week. >> she has some of the same callers that are calling her every day and becoming friends with these people. >> reporter: success of dial a star has gina rodriguez expanding her business. soon, you'll be able to dial and athlete including nascar drivers. >> what's up? >> reporter: hopefully not when they're behind the wheel. i'm david wright for "nightline" in los angeles. >> what a great country. dial a star. thanks to david wright for that. up next, well, his romance with farrah fawcett tore his family apparent. now, ryan o'neal finally opens

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he may be an oscar nominated actor, but he's probably more famous for his offscreen drama. from his relationship with farrah fawcett and his bitter arguments with his daughter, ryan o'neal opens up. >> why did you bulldoze me into buying you coffee? >> i like your body. >> reporter: he's the heart tloeb who helped turn love story

into a film classic. >> love means never having to say you're sorry. >> reporter: but ryan o'neal's real life love was the ultimate tv star. they were the picture perfect couple, but behind the smiles was an on-again, off-again, tumultuous relationship that went on for 30 greerps and only ended with her death from cancer. you wanted to write the love story. >> i know about love stories a little bit. and i had a tremendous one with her. >> reporter: what made it work? >> she was adorable. she really was. she mesmerized me. i just had never met anyone like her. it was scary. >> reporter: in his new book, o'neal talks about the roller coaster relationship, years that by his own account left his children scarred. most notably, his daughter, tatum, who sank into substance abuse. their relationship was fraught. >> your temper. i believe that we didn't speak for so long -- >> no, it isn't. >> what is it? >> farrah.

>> reporter: they tried to repair the rift in a rheeality show last summer on oprah's network, own. >> si'm sorry. she needed we needed you, too. >> you still open me $200. >> reporter: o'neal says tatum became jealous of the time he spent with fawcett. >> reporter: it seemed like tatum was the other women. >> well, she wasn't. >> reporter: one could argue, she was the child, you were the grownup. >> reporte >> she was a pretty mature 16, i should say. i don't know what i could have done. >> reporter: so, she pulled farrah aside, say, my dad, he's going to use, throw you away, just like the rest of them. >> he's a brute. >> reporter: was there truth to that? >> no, i'm not a brute. or if i am, it's with a small b. oh, my god.

>> reporter: viewers got a taste of what that might mean on their reality show. >> don't tell me you didn't do those things. you want me to bring up drugs or the hitting? >> reporter: were you abusive? >> that's what tatum said. >> reporter: is that fair? >> no, it wasn't. >> reporter: the truth is that three of o'neal's children have struggled with drugs and alcohol. redmo redmond, his on the with fawcett, has been in and out of rehab 12 times. >> there is a very strong genetic component to addiction. is that what you seep as plaguing your kids? what do you point to? >> i don't point to me. i point to their mother. >> reporter: maybe the mothers are pointing at you? >> i kept a fairly loose house here and they were musicians. the room over here was actually a band room. but that's a loose, maybeoo loose way of living. >> reporter: do you feel you failed as a parent? >> sure, of course. i'm a failed parent. >> reporter: one of the more wrenching scenes in farrah's story showed redmond, in chains, coming for a brief trip from jail to visit his mother's death

bed. >> people have complained about it, said we were just using him, but no, no. they had a wonderful time together. she died a few months later. >> reporter: having battled leukemia, o'neal now 71 has been diagnosed with mel mona and just this past month, prostate cancer. >> i have a prostate cancer that is contained. >> reporter: you were just diagnosed. what was your reaction? >> why me? >> reporter: and you are determined, obviously, to fight it? >> sure. farrah taught me that. >> reporter: you said that if you had a chance, you would say you're sorry to farrah. >> i think that's the first thing every man should say to his woman. >> reporter: and so that flies in the face of the cliche that love means never having to say your sorry. >> oh, wait now. >> love means never having to say your sorry. i still owe her 1,000 more sorries. >> reporter: for "nightline," i'm juju chang in malibu, california. >> ryan o'neal. thanks to