The victims were between 2 and 29 years old, the Riverside County Sheriff's Department said in a statement.
A 17-year-old girl managed to escape from the residence in Perris, California, on Sunday and called 911 from a cell phone she found in the house, police said.
The girl claimed her 12 brothers and sisters were held captive inside the home by her parents, some of them tied with chains and padlocks, the Riverside County Sheriff's Department said.
The 17-year-old "seemed to be only 10 years old and was slightly haggard," said the Riverside Sheriff's Department.
Sheriff's deputies responded to the home and found the other 12 victims, who "looked malnourished and very dirty," authorities said. They all looked like children, police said, and the agents were surprised to learn that seven of them were adults. Several were chained to their beds "in a dark and smelly environment," said the Sheriff's Department.
David Allen Turpin, 57, and Louise Anna Turpin, 49, were charged Sunday with torture and endangering children, the Sheriff's Department said. The couple was taken to the Robert Presley Detention Center in Riverside.
Bail was set at $ 9 million for each, said the Riverside County Sheriff's Department.
It was not immediately clear if the suspects had a lawyer or if they had filed a guilty plea.
The six children, including the 17-year-old who escaped, are being treated at the Riverside University Health System Medical Center in Moreno Valley. The seven adults are being treated at Corona Regional Medical Center in Corona, authorities said.
Home listed as a school, according to state records
David Turpin appears as the principal of the Sandcastle Day school, according to a website of the California Department of Education. He was operated outside his home, the same anonymous residence, without a name, where the 13 victims were found. The day school opened on March 21, 2011 and was described as a private school serving grades 1-12. According to the website, the state of the school is "active".
A neighbor told the station that she saw the parents being arrested early Sunday morning. The children were taken from the house in their pajamas, he said.
"They were very, very pale, almost as if they had never seen the sun," said the neighbor.
"And they were mostly girls … something like framed," said the neighbor.
"I thought they were like 12 because they looked so malnourished, so pale," Milligan said.
"It's so sad, so horrible," said another neighbor, Jennifer Luna, to the station, shaking her head. "I can not believe this, I can not believe this."
Court records: David Turpin had worked as an engineer
The Turpins moved to the Perris house in 2010, public records show .
The following year, they filed for bankruptcy in California, according to court records.
Ivan Trahan, a lawyer who represented the couple at their bankruptcy hearing, told CNN that "there was nothing out of the ordinary" about the couple when they worked with them in 2011.
David Turpin won around of $ 140,000 per year working as an engineer at Northrup Grumman, according to the bankruptcy documents. The occupation of his wife was listed as "housewife".
He listed about $ 150,000 in assets, including about $ 87,000 from the 401k plans of Lockheed Martin and Northrup Grumman, according to court documents. The documents listed debts of around $ 240,000, which included mainly credit card debt and a farm run in Rio Vista, Texas, valued at $ 40,000.
Trahan said that none of the Turpins seemed upset because they were bankrupt.
"They came with a lot of debt, we just knew there was no way they could make their payments," Trahan said.
The lawyer said the couple "spoke fondly of their children and even showed me their photos of Disneyland."
& # 39; This is a very respectable family & # 39; said the suspect's mother.
David Turpin's mother, Betty, told CNN that the couple usually took vacations with the whole family. They have 13 children, she said, and they usually dress the same when they go out for safety reasons.
"They were very protective of children," he said. When they left, the couple would train the children according to age, and the parents took their places at the front and at the end of the line, she said.
"It was easier to keep up with the children" that way, he said.
"This is a very respectable family," he added.
A series of social media videos showed the couple renewing their vows at Elvis Chapel in Las Vegas, Nevada. It seems that they have renewed their vows several times in recent years, in 2011, 2013 and 2015.
In the first video, an Elvis Presley impersonator sang "Love Me Tender" while walking smiling with Louise Turpin down the hall to reaffirm her commitment to her husband after 26 years together.
"I offer you this ring," said David Turpin, repeating after the impersonator, "as a symbol of my love, baby, baby."
Then, they danced to the "I can not help but fall in love with you" rhythm of Presley.
The children of the couple joined them for the 2013 and 2015 renovations.
In a ceremony, the girls, in plaid dresses, lead the processional, and the children, dressed in dark suits, They stop with their father.
You can see an excited David Turpin repeating his votes in the video. The children laugh along with the Elvis impersonator, and the couple kisses while their daughters applaud.
CNN's Braden Walker, Amanda Jackson, Artemis Moshtaghian, Stephanie Becker, Cheri Mossburg and Dave Alsup contributed to this report.