enforcement about what happened to her. >> there was a dramatic break in the case. >> steven and marlene aisenberghave been charged with lying to authorities. >> reporter: the indictment includes jaw-dropping quotes implicating the aisenbergs in the death of their infant daughter. >> the aisenbergs discussed on several occasions that the baby was actually dead. >> is there anything at all that you guys have to say? >> reporter: and just how did prosecutors know what they discussed? turns out police had secretly been bugging their florida home for nearly three months, recording more than 2,600 private conversations. >> a chilling twist in the story of a missing child in florida. >> one was in the bedroom and one was in the kitchen area. >> i had never heard before our since, about putting a wiretap in a marital bedroom. >> reporter: yet prosecutors insist they'd found a smoking gun in those private comments leading to salacious headlines. marlene quoted as saying to steve, "the baby's dead and buried. it was found dead because you did it." and this damning comment attributed from steve, "i wish i h