I'm not sure about Dede, Cypress...don't know what to think. I just can't imagine a plot with two women plotting harm against a small boy. It seems as though Dede was accounted for, as far as we know from early AM until about 9:45 or so, which seems to preclude the abduction. That's why I am thinking any "help" she gave would be afterward. And maybe she is trying to avoid being charged with accessory or she has guilty knowledge. I just don't know-as a LE daughter, she may be more cautious about speaking without a deal.
Honestly, I don't think Dede is involved at all. If her relationship with Terri is not what it appears to be, a simple friendship, then that's another issue entirely. She moved in with Terri after Kaine left and, IMHO, suggested the batphones because she realized LE was on Terri like white on rice. I strongly believe that Dede believes or believed Terri is innocent, helped her, gave some horrible, awful advice, and unfortunately insinuated herself into this investigation.
DS is nothing more than a distraction, IMHO.
I honestly believe that the accomplice theory is Desiree and Tony's, and with DS being an (AHEM) unusual person, the batphones gave the story legs. Her supposed unaccounted for time has varied, in various articles, from 9:00, 9:45, 10:00, 10:30, 11:15 and 11:30 until 1:00. With the discovery of the batphones, Dede wasn't about to try to alibi herself out, IMHO. If she believes Terri is innocent, she believes she could be next in terms of a target, which is, IMHO, why she's stayed quiet.
In the end, I think DS's crime will be the suggestion of the batphones. At most, perhaps DS and TH were together that day, but not for the reasons LE assumes, IMHO.
All IMHO, of course.