Transcript for Doctors speak to ABC News about some of the siblings in California 'torture' case
And we begin with new reporting and new video, after 13 siblings were allegedly held captive in their own home, some shackled to furniture and malnourished. Family photos have been made public. The brothers and sisters, the youngest, just 2 years old. David and Louise turpin are now accused of torture and child endangerment. And now they are the ones in handcuffs. Tonight, we are now learning the story of the daughter who bravely crawled through a window to get out and get help. She was so thin, authorities thought she was just 10 years old. She is 17. ABC's Matt Gutman leads us off. Reporter: Tonight, the dramatic escape from that tortured household. Authorities praising that 17-year-old girl who called for help, clam boring through a window early Sunday morning, calling 911 from a deactivated cell phone, showing deputies photos of her siblings in their prison. If you can imagine being 17 years old and appearing to be a 10-year-old, being chained to a bed, being malnourished and juries associated with that? I would call that torture. Reporter: Neighbors' very say surveillance video showing the moment David and Louise turpin were led away from their southern California home in cuffs. When the deputies arrived to arrest them, Louise turpin was, quote, perplexed. But what police found inside was shocking. There were three individuals that were chained to some type of furniture inside the residence. There was a very foul smell inside the residence. It was extremely dirty. Reporter: Investigators say the turpin's 13 children were horrifically malnourished. Ranging in age from 2 to 29, the doctor who has been treating the adults say they have likely been enduring this for years. Everybody thought they were children. Reporter: Even the 29-year-old? The 29-year-old specifically. She has a body that is underdeveloped, 15 years old. Reporter: 29-year-old has the body of an underdeveloped 15-year-old? Yes. Reporter: In family photos, at least, it seemed a happy family. A trip to disneyland. At this renewal of vows ceremony in Las Vegas, the elv chapel posting their ceremony online. They sang with me. They had fun. They seemed to be happy. All of them. Reporter: Several neighbors telling us they never even knew children lived at the house or only caught a glimpse of them at night. They've been outside before doing yardwork at 11:00 at night. Reporter: 11:00 at knight they were doing yard work? Yeah. All the neighbors there stunned. Matt Gutman there outside the hospital where a number of the children are being treated. And you are learning more tonight about what the doctors are trying to do to help them, Matt? Reporter: That's right, David. The doctors told me tonight that it took years of abuse to so severely stunt the physical development of those young adults, and it will take many months of gentle nourishment to build their strength back up. It will take much longer to heal those psychological scars. David? Matt Gutman leading us off again tonight.
This transcript has been automatically generated and may not be 100% accurate.