California officials say they're frustrated in their efforts to find out why social services systems have "harmed" some of 13 Turpin children following their 2018 rescue.

Six of the 13 Turpin siblings who were rescued in 2018 from their parents' California home have filed suit against their county and others tasked with protecting them.

Residents confronted Riverside County officials after investigators outlined how the county failed to adequately care for the Turpin siblings following their 2018 rescue.

The 13 Turpin siblings, rescued in 2018 from their parents' California home, were "failed" by the social services system, said a report issued by outside investigators.

Months after investigators began probing alleged failures in the care of 13 Turpin children, they say they still can't access needed records due to confidentiality rules.

Vanessa Espinoza wrote in a statement that she will cooperate with an investigation into the treatment of the Turpin siblings, after they were put into county care.

"I just felt like I had to do it," Jordan Turpin said.

"I danced,” said Jennifer Turpin.

"My two little sisters right now are chained up," Turpin told the dispatcher.

New details were revealed Friday about an independent probe into the treatment of the Turpin siblings since their dramatic 2018 escape from captivity.

Seventeen-year-old Jordan Turpin escaped her parents' filthy Perris, California, home and dialed 911.

Jennifer and Jordan Turpin share their stories for the first time.

Nearly four years after the 13 Turpin siblings were rescued from their abusive parents, an ABC News investigation finds that some of them continue to face hardships.

The Turpin siblings say they are still struggling to access basic living necessities.

When Jordan and Jennifer Turpin's exclusive interview with ABC News' Diane Sawyer aired this weekend, Jordan Turpin said "it was really hard for me to watch."

David and Louise Turpin were arrested in Perris, California, in January 2018.

The California home was the site of alleged torture and abuse for years.

The 13 Turpin siblings were found in January and their parents were arrested.

Twelve of the 13 siblings were allegedly held captive by their parents.

The "siblings want to be known as survivors, not victims," their lawyer said.

The 13 Turpin siblings were found last month and their parents were arrested.

The 13 Turpin siblings were found last month and their parents were arrested.

The mother would wait outside the classroom for her son, prosecutors said.

David and Louise Turpin are accused of abusing their children for years.

Two parents were arrested in the torture and child endangerment case in Calif.

Parents David and Louise Turpin have entered not guilty pleas in torture case.

David and Louise Turpin were arrested for torture and child endangerment.

The alleged victims were rescued after one sibling escaped and called 911.

Thirteen siblings were rescued from their parents' California home on Sunday.

The alleged victims were rescued after one sibling escaped and called 911.

Susanne Reisenbichler's said her first reaction was, "Oh no. Somebody else."

The current owner said he was certain feces were smeared on the walls.

The current owner spent up to $35,000 and three months restoring the home.

The couple was arrested after one child broke free and called police.

The aunt of 13 siblings allegedly abused and held captive by their parents says her family tried "for years" to get in touch with her sister.

Two parents were arrested in the torture and child endangerment case in Perris.

"The human spirit is incredibly resilient," Smart said.

The siblings are still being evaluated by a team of doctors.

The parents were booked for torture and child endangerment, authorities said.