I voted for #1 in hopes that Isabel is still alive. I refuse to blame her parents until I have some hard core evidence! I can't imagine losing a child and then to be blamed for it. Even with CPS involved I still don't think Isa's parents had anything to do with her dissapearance. JMO
I voted 'other' because I dont think the person is a registered SO. I believe it is going to be like in the case of Sierra Lamar where the perp was not a RSO but may have had some run ins with the law but with little convictions.
Or they may have no criminal past whatsoever like David Westerfield didnt and this was the first time they went out of their comfort zone to kidnap a young child. They may have molested children in their own family in the past who have never told.
I think it very well could be a stranger but also think it could be someone that lives in the general area of the Celis family or someone who worked close by. Maybe even someone who would blend in at the functions the Celis family attended.
Someone mentioned that if Isa was abducted by a stranger she was targeted and that is true. Just like all the other stranger pedophile abductors chose their victim(s).
I do believe Isa is deceased and has been shortly after she was abducted.
IMO
I voted 'other' because I think only one parent knew at the time what happened that night/morning.
I think there was probably some form of abuse, and Sergio must have killed her (is that accidentally?).
I think someone else helped cover it up, but not the rest of the immediate family. The mom may be covering now, though, imho.
#5 and #6 say the same thing, don't they?