"I'm sorry for everything I've done to hurt my children. I love my children so much. ... I only want the best for them," a tearful Louise Turpin said as she and her husband David learned their fate.

Soledad O'Brien dives deep in to the troubled lives of the Turpin family.

Season 1  

“Things were weird and suspicious. And I wish I had done more. I really do wish I’d done more," Turpin neighbor Shelly Vinyard tells Oxygen.

Teresa Robinette, Louise Turpin's sister, said: "I think they’re just very, very good actors."

“The family told us girls that the best thing to do would be to be quiet," Teresa Robinette told "Turpin 13: Family Secrets Exposed," which premieres Saturday, April 28 at 6/5c. 

S1/EP1  

The Turpins' neighbors were appalled at the condition of the house after the Turpins moved out of the neighborhood.

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Did something happen to Louise and David Turpin along the way? Or were they "very good actors"?

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Teresa wishes she knew where Louise and David went astray.

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What will be revealed when investigators go through the Turpin children's journals?

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The Turpins seemed to have a fascination with Disneyland.