talking to the media, appearing on "good morning america." >> we are now joined by marlene and steve aisenberg. >> reporter: "oprah" and "20/20." >> we take you inside this explosive case. >> reporter: then two months after sabrina vanished, the aisenbergs find themselves in danger of losing their two other children as well. this time at the hands of florida's child protective services. how frightening was it for you? the department of children and family services showed up and started -- >> it was -- >> reporter: looking at your other children. >> it was scary as hell. >> and we -- we -- you know what, we left the room and let them interview our children. and after they left, they said, "these kids are great. there's nothing wrong in this household." >> reporter: a week later, the couple back on the hot seat this time with federal prosecutors asking questions in front of a grand jury. >> do either one of you have anything you want to say? >> reporter: but if authorities think this will finally get the aisenbergs talking again, they are wrong. >> steve and marlene aisenberg were silent as they