Does anybody have any ideas of how LE would come to the conclusion that the crime was calculated and planned? From the information released so far, the only thing I come up with is that they found some sort of "nest" - a place the monster set up to commit the crime. Maybe with a stash of supplies, such as whatever her poor little body was wrapped in, if anything.
I get the feeling that LE is pretty close to finding the murderer.
While the Mom might be guilty of neglect for not watching her children, I don't think the family is involved. The people who are "reporting" that she had loud parties and alcohol and drugs were involved are former neighbors, from another apartment complex where she used to live. People here are picking up on comments made on news stories and reporting them as fact.
If you look at the other side of those comments you will see the supporters of the family. The Mom is working nights at a chicken processing facility, now that is a hard and not very rewarding job. But it probably pays pretty good considering her alternatives. The Dad is working in Miami on a construction job (building a tunnel?) so he can raise extra money to support the family.
Maybe, the partying days are over and these two really are trying to make things better for their children. But of course there is also, Maybe Not...