. >> my name is kayla mueller, i need your help. >> the young american aid worker captured in syria, tortured and killed while being held by isis. her untold story. >> we need t they are not going to bring kayla home. >> her parents' desperate fight to save her. >> please show mercy and use your power to free our daughter. >> and for the first time her fellow prisoners tell about the ordeal. >> she had a strong faith that gave her a lot of strength. >> how they say kayla stood up to jihadi john himself. >>> tonight he took a pill but would you recognize the singer an unlikely take on fame from a man who's had it and lost it and now has it again. how mike posener has become a kind of anti-pop star. >>> first the "nightline 5." >> looking for balance in your digestive system? try align probiotic. for nonstop sweet treat goodness, hold on so your tiara kind of day. live 24/7. try align, the number one ge-recommended probiotic. >>> a nutritional needs in one. purina one. healthy energy and a taste he loves. purina one smart blend expertly blended with real meat number one. all in one, pur

we begin tonight with the untold story of kayla mueller, the young humanitarian aid worker from arizona who fell into the hands of isis. a heartbreaking tale from her parents and for the first time from other young women imprisoned with kayla. they tell us about the brutality she endured and her bravery in the face of the infamous jihadi john. here's abc's brian ross. >> reporter: the home movies show a young woman in love with life. traveling the world as a humanitarian aid worker. making her parents so proud. >> she just always had such a compassion for everybody around her. >> you're always learning about yourself through other people, and you're always learning about life. and that process never stops. >> reporter: and then one morning at the home of marcia and karl mueller, three years ago this month, came this. >> my name is kayla mueller. i need your help. it's very terrifying here. >> reporter: their 24-year-old daughter kayla was in the hands of one of the most brutal terror groups the world has ever known. isis. >> you just go into almost a catatonic state, i think. you just -

soon learned from kayla herself that there was plenty to worry about. >> my name is kayla mueller. i need your help. it's very terrifying here. >> and then it went blank. >> reporter: kayla had been captured by one of the most brutal terror groups the world has ever known. isis. >> you just go into almost a catatonic state, i think. you just can't even stand up. >> reporter: carl owned an auto repair shop. marsha, a former nurse. nothing prepared the muellers for what was about to happen -- the scary, secret world they were about to enter. >> this kind of thing tears later watch the brutal murders by isis of three young american men. >> i'm back, obama. >> reporter: the plight of a fourth american hostage, kayla, was kept a closely held secret. >> obviously the white house doesn't want this to all come out. >> reporter: tonight, on "20/20," the muellers are coming forward to tell the story of how they fought for kayla's freedom. >> kayla is not your enemy. >> reporter: the messages and e-mails with isis in syria and the muellers in arizona never seen or heard before tonight. >> si

here's more. >> my name is kayla mueller. >> reporter: it's been three years this month that kayla mueller was first taken hostage by isis. >> very terrifying here. >> reporter: her parents marcia and carl learned of her death 18 months later when isis sent pictures of her body. president obama said he was heart broken and traveled to arizona to meet the muellers for him. >> and i said mr. president i'd be remiss if i didn't give you the opportunity to support her foundation, and he said i will help that foundation, and i'm still waiting. >> there hasn't been such a donation? >> no. i'm still waiting for that donation mr. president. >> reporter: at the white house friday, an abc news correspondent pressed for an explanation. >> can the family expect pr donation in the name of kayla mueller soon? >> as i mentioned, i can't speak to any previous conversations with they've had -- >> but is a donation coming? >> but the foundation that's been established in kayla mueller's memory, is certainly the kind of foundation the president and first lady have supported in the past, and i anticipate they

kayla mueller, 26 years old, is dead. >> my eyes are clouding up, sorry. still not believing the horrific people had lied so much and were so evil. >> reporter: precisely how kayla was killed remained a mystery. the muellers refused to believe that kayla was dead, until isis a few days later, sent three photos of kayla's body. >> i just kept still writing to kayla. hey, sweetheart, have so much to share.yo so very much. i will see you soon. love, mom. but entresto is a medicine that helps make more tomorrows possible. ? tomorrow, tomorrow... ? ? i love ya, tomorrow ? in the largest heart failure study ever. entresto helped more people stay alive and out of the hospital than a leading heart failure medicine. women who are pregnant must not take entresto. it can cause harm or death to an unborn baby. don't take entresto with an ace inhibitor or aliskiren. t take entresto. the most serious side effects are angioedema, low blood pressure... ...kidney problems, or high potassium in your blood. ? tomorrow, tomorrow i love ya, tomorrow.? ask your heart doctor abou

kayla? >> no. >> reporter: and after a failed u.s. rescue mission, the muellers say a white house official threatened them and their friends with criminal prosecution if they tried to raise ransom money. >> our government slammed that door. >> reporter: of kayla was killed, the president came to visit them. the muellers say he made a promise to help the foundation they set up in kayla's name, and then broke it. there hasn't been such a donation? >> no. i'm still waiting for that donation, mr. president. >> reporter: today, our team pressing the white house for an answer. >> reporter: can the mueller family expect that the president, that the obamas will make a donation to their daughter's foundation, the foundation in the name of kayla mueller soon? >> as i mentioned, i can't speak you that -- >> reporter: but is a donation coming? >> the foundation, kayla's hands, that's been established in her memory is certainly the kind of foundation that the president and first lady have supported in the past and i would anticipate that they would make a financial contributi

breaking message to her family while in the custody of isis. >> my name is kayla mueller. i have been here for too long. i have been very sick. very terrifying here. >> e-mailing the clip to kayla mueller's parents after she was kidnapped demanding a $5 million ransom. despite knowing she was being slave labor. that video also brought them hope. >> how thin she looked. i saw her eyes were clear. she was very steady. so i -- you know, it broke my heart but i also saw her strength. >> the incredible decision to stand up to executioner to declare her faith. it will be detailed by fellow hostages and parents tomorrow on 20/20 at 9:00 p.m. on abc 15. my son has meningitis b. but how did we end up here? his mom thought he had the flu ved. until 2014 there were no vaccines for meningitis b in the u.s. now there are. while uncommon, meningitis b can lead to death within 24 hours. trumenba is a vaccine for 10 through 25 year olds to help prevent group b meningococcal disease. trumenba should not be given if you had a severe allergic reaction after a previous dose. most common side

kayla mueller taken by isis while helping doctors without borders. but her parents say the group her freedom. and with held critical information. see the interview friday night at 9:00 p.m. on abc 15. >>> death toll up to 7 and two dozen hurt from the attack at the american university of afghanistan. students barricading themselves in classrooms. a photographer for the associated press also in the area. on twitter he wrote he wasn't sure if he would make it out alive. >> kicked our door two times. panicked. >> he jumped from a second story window to escape. more than 30 students and staff rescued. we know police killed two gunman but it is unclear if there were more who got away. >>> calling it a geyser, a spurt of water from a broken pipe -- broken pipe caused by a car crash. for a while. no washing, flushing, drinking at all. >> i am thinking to myself, what could they be working on at 2:00 a.m. in the morning and i came outside and the water was higher than it trees. >> they trucked in water to help the families make it through the hot day. to hap

this month that kayla mueller was first taken hostage by isis. >> very terrifying here. >> reporter: her parents, marcia and carl learned of her death 18 months later, when isis sent pictures of their daughter's body. president obama said he was heart broken, and traveled to arizona to meet the mueller's and asked what he could do them. >> i said i'd be remiss if i didn't give i the opportunity to help her foundation, and he said i will. i'm still waiting. >> there hasn't been such a donation? >> no. i'm still waiting for that donation mr. president. >> reporter: at the white house friday, an abc news correspondent pressed for a comment. >> can the mueller family expect him to make a donation soon? >> as i mentioned, i can't speak to any previous conversations that they've had, but i can tell you -- >> but is a donation coming? >> the foundation kayla's hands that's been accomplished in her memory is certainly the were kind of foundation the president and first lady have supported in the past, and i expect them to make a financial contribution to continue supporting it. >> reporter:

kayla mueller's family is speaking out.. saying the u-s government failed them. carl mueller: "so we put all our faith in the government and they let us down. and they let us down. why her family is now criticising president obama for a promise they say he never kept. stay with us. december last year. 14 americans are killed in a mass shooting inspired by isis. in the aftermath, congressman joe heck had the chance to ban suspected terrorists from buying guns. heck voted "no." 23 times. individuals on the fbi terror watch list have purchased firearms over 2,000 times. it's not just that joe heck does nothing to stop them. it's that he's voted to let them keep doing it.... 23 times. senate majority pac man's blue volvo stopped along the road. but suddenly.. the driver backs-up and pulls away with the trooper following. it ended when the deaf man was killed only feet from his home. trying to use sign language when he was shot. the video is now being reviewed by investigators. new information tonight on the young american aid worker kidnapped by isis. kayla mueller's

it's terrifying here. >> this is chilling video of kayla mueller, the prescott native captured and killed by isis. it was posted by abc news and described as a proof of life video sent to her parents. >> the obama administration defending itself after kayla's family criticized the president for never following through a promise to make a donation to a foundation set up in their daughter's name. >> kayla's parents accuse the administration of threatening to prosecute them if they attempted to pay the $6.2 million ransom for her release. all of this comes on the eve of a playground being dedicated in her honor up in prescott. >> team 12's trisha hendricks' spoke to kayla's father tonight. >> reporter: it is wonderful for us to have this. it is an honor. >> reporter: during a one on mueller's father karl, he choked up a few times talking about the meaning of the swing, slide, zip line, and climbing equipment. >> well ... it represents our daughter. it is what she would love to see these kids here playing. and having fun. i mean, the giggles. >> reporter: it hurts knowing his daughter won't b

more video as well as the full interview with kayla mueller's parents. all on abc 15. >>> will he be forced to go back to brazil? ryan lochte charged for the story about being robbed but experts say he could just send doesn't have to show up. if they want him to serve time this crime doesn't require the u.s. to send him back. that is what dancing with the stars are hoping for. a source confirms ryan lochte is in talks to join next season. max is coming back. he got off the dance floor four seasons ago. he says he is in the best shape have fun. >>> time now for your forecast. abc 15 desert doppler tonight as we continue to track showers and thunderstorms in the higher terrain. the valley is in the clear. chance of action over night but right now everything is to the north. talking from yarnell up to prescott at this hour, shower and thunderstorm activity. 16 lightning strikes. and more through nag staff just in the -- flagstaff just in the last 30 minutes. to the south and east of there north, northeast over night. we will continue to watch what's happeni

video: my name is kayla mueller. but that all ended with this video, being seen this morning for the first time. video: i've been here too long, and i've been very sick. it's very terrifying here. kayla mueller had been taken supposed to have been a quick trip into syria. as isis brutally murdered three young american men, the plight of the fourth hostage, kayla remained a closely held secret. as her parents marsha and carl mueller, desperately worked behind the scenes to gain her freedom, sending their own videos to isis. marsha video plea: please show mercy and use your power to free our daughter. there would some 27 e-mails back and forth between the arizona, and her isis captors in syria who at one point set a 30 day deadline for a $6 million ransom. "or we will send you pictures of her dead body." but the muellers say a white house official threatened them with prosecution if they paid ransom for their daughter. carl mueller: i don't know how we survived but i remember the argument. marsha, we need to do somethi

month that kayla mueller was first taken hostage by isis. >> it's very terrifying here. >> reporter: her parents, marcia and carl, learned ofer pictures of kayla's body. president obama said he was heartbroken, and traveled to arizona to meet the muellers and asked what he could do for them. >> i said, mr. president, i'd be remiss if i didn't give you the opportunity to support kayla's foundation, and he said i will help that foundation. i'm still waiting. >> there hasn't been such a donation? >> no. >> reporter: at the white house friday, abc news correspondent jon karl pressed for an explains. >> can the mueller family expect that the president and the obamas will make a donation to their foundation in the name of kayla mueller soon? >> as i mentioned, i can't speak to any previous conversations that they've had but i can tell you that -- >> but is a donation coming? >> the foundation, kayla's hands, that's been established in her memory, is certainly the kind of foundation that the president and first supported in the past, and i would anticipate that they would make a financial co

> a dedication ceremony being held tomorrow in prescott at it's a playground built in honor of kayla mueller. mueller was a humanitarian aid worker who was kidnapped by i.s.i.s. militants in syria. she was tortured, raped, and eventually killed. mueller's father told abc news that president obama promised to make a contribution to kayla's hands, a foundation started in kayla's honor, but the president has not made good on that promise. >> he says you won't will be an anonymous donation, but i will. i'm still waiting. >> white house officials cannot explain why a donation has not been made yet but have promised it was coming. meanwhile, we'll stream the dedication live on our facebook page at 10:00 a.m. to see it just head to facebook.com/fox10phoenix. >>> community leaders in maryvale, a phoenix neighborhood, are worried that the phoenix serial shooter case are hesitating to call because an investigation into immigration status could follow. today leaders in the area pleaded with people to help in any way possible to help get the killer off the streets. >> i'll be talking to my neighbors, an