I agree we may never know exactly how Caylee died At this point we could speculate on a variety of ways. It could have been premeditated, either with careful planning or simply by an angry response to an altercation between KC and Cindy. It could have been with chloroform or duct tape or neckbreaking. It could have been unintentional, a violent reaction to a tantrum, medicating Caylee and putting her in the trunk to sleep. It could have been an accident, not necessarily from a pool but even just leaving a crying child in a car in the heat while KC got outside to talk on her cellphone. The particulars are actually rather immaterial.
Any and all of the above are considered Murder 1 in FL with a child under twelve, even felony manslaughter. The only difference is the sentence.
The point is, it doesn't really matter how it happened, whether intentional or accident. KC never admitted it or told anyone. If it was an accident, she never called 911 or reported it. She spent an entire month lying to family and friends about where Caylee was and who she was with, apparently not distraught enough to stop from indulging her every whim. When the situation was reported, she told absurd and elaborate lies to the police and tried to implicate others. She behaved as if she didn't care much for anyone but herself and was openly hostile and uncooperative. She made no real effort to retract her false statements and contribute anything useful to the search for her daughter. These behaviors are undeniable. Every single witness questioned admitted she was a pathological liar. Her own mother is on record with several individuals as openly suspecting her of being a sociopath. We know for a fact she stole money from family and friends with little or no remorse.
When Caylee's body was actually found we could postulate that the duct tape around the mouth was either the cause of death or placed antemortem to affect a kidnapping story. Either way, KC has been trying to avoid responsibility for the death of her child.
I can suspend my disbelief in other cases but we have had reams of proof already that, whether this was accidental or not, the premeditated way in which KC covered up the death and the way she showed no respect for others' property or belongings, indicates she has exhibited repeated criminal behavior and is responsible for this.
The undebatable and overwhelming preponderance of the circumstantial evidence points to a person who had a repeated and an escalating willful and wanton disregard for what belonged to others, up to and including life itself, and that who is unwilling to accept responsibility for any of her actions. Nobody else in this scenario even comes close to such a description, much less have equal motive or opportunity. For that, I can relax the inclination of "innocent until proven guilty". After carefully considering the evidence already available, I can can with a clear conscience postulate she and only she is guilty of what happened to little Caylee.
The fact that she and her team are ready to pin it on even more innocent bystanders to help her once again escape the consequences of her actions is what probably makes most of us so disgusted and upset. The additional fact that her team feels they are the only entities who should profit from this tragedy - particularly when their strategy and actions have ultimately cost the state as well - is adding insult to injury.
In other cases, it may be prudent to withhold judgement until all the facts are in. But this entire family has done nothing but obfuscate the truth or outright lie after the fact. At some point it's just common sense to say that no real evidence exists for a reasonable alternative explanation. Deconstructing tiny facts and parsing particulars doesn't change the big picture. It's Murder One, accident or not, and no other explanation than KC did it is anywhere near feasible.