The Riverside County Sheriff’s Department said a 17-year-old girl told authorities that she managed to escape a Perris, California, home and call 911 to alert police that she and her 12 brothers and sisters were being held by her parents — and that some of her siblings were bound, shackled or padlocked to beds.

When officers arrived, they discovered 12 people ages 2 to 29 being held captive in squalid conditions. The girl who escaped is believed to have been a 13th victim.

David Allen Turpin, 57, and Louise Anna Turpin, 49, were being held on $9 million bail each on Monday.