I am thinking out loud. After watching 48 hours about another case. I wonder if the Celis had any kind of insurance on the kids or kidnapping insurance.
I have always felt that this might have had a financial enrichment aspect attached to it. That's IF she's alive. Although it was scoffed at, the idea that a large reward could be claimed made me wonder if someone would try to set this up to do just that, call in a tip and "claim" the reward. I think back all the way to Sergio's original comment at the first media appearance, i.e., "What are your demands?" I mean, who says that?? Then again, who says, "Look at her, she's beautiful" in response to a question about what he would say to her abductors.
Also, regarding the two male voices that the neighor heard at 6:30 a.m., I wonder if one of them could have been the 14-year-old son? Perhaps that is what LE believes and they are trying to get him to open up and feel Sergio has threatened him and thus the no contact order.
Other comments that may support an enrichment scenario: LE's comment that "things aren't always what they seem" coupled with their complete lack of searches; and news reports that schoolmates of the sons were being questioned to see what they may have been discussing in the week before their sister went missing.
But I think it's equally possible, and maybe even probable, that she is deceased because of the dog hit and landfill and waters searches early on. If so, the son could have been involved in any way along the line and the rationale for a no contact directive would be the same.
Last thought: The FBI's Behavorial Analysis Unit is still on the case. IMO, they're the force behind LE's calculated moves and public announcements about the family that are meant to smoke out the truth. The no contact order feels in part like more of the same.