There have been bungles in this case, most definitely. While the majority come from Casey Anthony and the Anthony family interference i.e misleading statements, LE have also had some less than shining moments too.
The fact remains now though, it is their duty, their responsibility and their damn job to get it right now, and I believe that they will. As mundane as this sounds, sometimes the greatest satisfaction that can come from such a strenuous and emotionally and spirtitually depleting job such as the job LE and all associated face is bringing the criminal to justice - I trust they will do their absoloute best to bring Caylee justice, and that may very well mean a level of satisfaction is found in Casey being incarcerated for the rest of her life or recieving the death penalty.
I also feel I should add, JB isn't reallly doing anything other defense attorneys wouldn't do. Yes, his actions may be found to be reprehensible, but his job is to get Casey off, or at the very least, reduce her sentence. He is on the defense and if that means that he targets LE and other mishaps - so be it. If LE follow procedure and present their case strong enough (FACTS DON'T LIE!) then I'm confident everything JB has done will be null and void.