(Just posting from the front of the thread here in answer to the thread question, I haven't read the thread yet
There wasn't any hair, fiber, or DNA from Casey at the crime scene /remains , and there was the partial DNA from someone else on the duct tape w/Caylee's skull (which had marker 17.)
There was a pretty exhaustive search of Casey's clothing/shoes, they were processed by FBI lab, and no trace of the crime scene or decomp or anything was found that should not be on them. Meanwhile, it was obvious to us (so also must have been to the jury) that TL for one was with Casey on the 16th and other important dates and his clothing was not all sent to the FBI lab, and no fibers or forensics mentioned regarding him/his place, or others. I'm referring NOT only to TL here.
The state couldn't say exactly when Caylee died, or where.
We knew that the Winnie blanket and t-shirt were seen in photos at the Glenwood apartment, I think the jury might have been shown the Globe photos with the t-shirt at least, but I can't remember if it was explained to them where the photos were. So we know at least these items didn't have to originate from A home, others had access. No forensics/fibers etc ever done in the Glenwood townhome or Sutton Pl apartment, which was just plain amazing/baffling. Apparently dogs not even taken there. I'm not sure how much the jury knew about these items not having had to originate from the A home, the state was still claiming in closing argument that these items originated from the A home and that supposedly that would mean only Casey could have accessed them, but of course the jury knew that other family members or Tony L and others were at the A home at various times.
Casey had been living with several other people at the Sutton Pl apartment and parking there throughout the time frame, likewise with Caylee at the Glenwood townhome, still visiting there after disappearance date. Anyone could have accessed the car essentially (maybe not to drive it but could access trunk anytime Casey was sleeping for example.) Likewise at the A home, others had access. So any trunk evidence, if someone considered the one hair conclusive for example (and I did think it was the strongest piece of evidence the state had), was still not exclusive to Casey as perp.
There just wasn't any evidence to tie Casey to the crime scene, much less to prove that she was the killer rather than someone else. There wasn't anything to actually disprove the defense's exact drowning scenario (I do find it unlikely, I think Caylee was probably murdered.) But it wasn't necessary to believe the defense's scenario in order to see that the state's case of Casey as the killer was not proved. And some of the jury members have said that, they didn't consider the allegations of abuse proved or even necessary, they weren't sure about the defense's scenario, there wasn't anything to actually disprove it, but evidence to prove the state's charges against Casey Anthony just wasn't there.
The jury had no choice imo, and did the right thing. I was very surprised though to be honest. I thought they might convict on suspicion alone. Call me cynical.
As I've always said I do hope the investigation has been ongoing and that we may see other evidence and charges emerge so Caylee can get justice. It's so awful not to have her killer held to justice. I'm sad the murder and manslaughter charges were brought against Casey now rather than later, if they'd surveilled her and other people longer, continued to gather physical evidence, etc, even at this very late date who knows what additional evidence could have come into play. But what a hard call for the state to have to make whether to go ahead or wait, and of course the public wanted justice right away. MOO