After a 17-year-old girl escaped her home and called police, authorities discovered that she and 12 brothers and sisters had allegedly been held captive in their home by their parents, the Washington Post reported. She was so emaciated that officers said they originally thought she was just 10 years old.
Strangely, as per the state records, David home-schooled his six children and the home was tagged as Sandcastle Day School.
The couple was not able to explain the condition of kids and also did not give a logical reason behind it.
Their bail was set at £6.5 million ($9 million) each, police said, and are due in court on Thursday.
The 13 children have now been admitted to a local hospital and once they are discharged, they will be under the care of the Child Protective Services and Adult Protective Services.
"They seemed like very nice people", she said by telephone. The sheriff's office said they all appeared "malnourished" and "dirty".
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"I had no idea this was going on", he told the Press-Enterprise of Riverside.
Seven of the prisoners were adults aged between 18 and 29.
Wendy Martinez, a 41-year-old housewife, said her only contact with the Turpins came as she passed the house at night in October.
The group were found in a neighbourhood of closely spaced one and two-storey, single-family homes. While investigations are ongoing, there are so far no signs that the children were sexually abused or that the parents have any signs of mental illness.
CEO of Corona Regional Medical Center, Mark Uffer, says, "I've been in healthcare for a long time, I've never seen this".