Link me to any child abduction case where the police take the statement of the last person who saw the child (Casey Anthony) that names a suspect where the police say, "Ok, we need to really sit down with this person and see if they really did it!" before they release a name to the public. That's not how missing children cases work.
Casey pointed the finger at ZFG and said, "ZFG, model/color of car, has two kids named *advertiser censored* and YYY, wears hair curly or straight, stole my kid." Law enforcement did their job and let the media know. Law enforcement did their jobs! Turns out what Casey said was a lie. Turns out Casey has a new charge against her that'll probably expand to include her family, and more than likely they won't need to even find a body or prove murder to have Casey locked up for the rest of her life*. Law enforcement should thank her for making it so easy!
*If they do find Caylee is dead and Casey did harm her on purpose, "the rest of Casey's life" will probably be shortened quite a bit, which is a bonus for the taxpayers she'll be mooching off of while she's sitting in prison!**
**I'm not bitter, I promise!