DCF may be investigating her for neglect due to what has recently happened. In other words, theirs may be a recent involvement. I know they screw up a lot. That's because you have far too few workers handling far too many cases. If we want that to change, we have to willing to allocate more of our tax money to social services. In further defense of them, there are tons of allegations made all the time, often without merit. I sure wouldn't want DCF taking my children from me based on the allegations of some nut or angry ex. They have to investigate.
That being said, if Logan actually had text messages on his phone from the ex saying she killed her son BEFORE the hearing, and they were able to locate the mother and child at that time, he should have been taken from her immediately. And for some reason, I seem to remember hearing something about DCF or LE doing a welfare check and finding the child was okay, prior to the hearing.