Some things I've been thinking about over the last few days --
If LE have stated repeatedly that there is no evidence Kyron is not alive, I take that to mean no evidence in terms of forensic, circumstantial, inadmissible, or otherwise. I include Terri's supposedly failed LDTs in this category. If Terri murdered Kyron, had him murdered, or handed him off to someone who she knew was going to murder him, and she's a sociopath, then it makes no sense that she'd pass this portion of the polygraph and fail a portion of lesser importance, let's say the questions about her whereabouts. If she's a sociopath and she's guilty, she passes everything. If she's not and she's guilty, she fails everything. FWIW, I don't believe LDTs are foolproof, but DY and KH are using those LDTs in the public sphere as proof of Terri's involvement, therefore, they're fair game, IMHO. Also, IMHO, if DY and KH believe the LDTs are proof of her involvement, then what they're saying in the public sphere should be an indication of what questions she failed. The inference from the beginning has been about her timeline not about Kyron's well-being. In fact, DY and KH have continued to assert that they believe Kyron is alive or "stashed" somewhere, indicating whatever portion of the LDTs Terri failed wasn't related to his well-being.
Is it possible LE believed her timeline story was bogus, they told her she failed the timeline portions of her polygraphs, but in actuality, she passed them? By all accounts, so far, LE is confirming the version of events she presented in her e-mail on June 5. That she had an account of her whereabouts early on is also baffling, considering Desiree strongly and publicly stated otherwise.
IMHO, I believe LE has evidence that indicates it would've been nearly impossible, from a time perspective, for Terri to abduct, murder, and dispose of Kyron, and also IMHO, that's why they've adjusted their theory to include DS and/or someone else. I think they've verified her timeline, and it matches up to at least what she's said from day one. Whether they believe she was driving the baby around for however long, and I'm inclined to think it was less than 90 minutes, is another story, but I think her account of her whereabouts matches up to the extent they are able to verify it, meaning she did go to two Fred's, she did go to the gym, she was sending e-mails and posting pictures from home to Facebook at the given times. She probably also went to Starbucks, hence the GJ testimony of the employees, accounting for more time and giving her less time to do anything nefarious.
Also, during the time in which she is accounted for, she's supposed to be picking up Dede? If she's also picking up Dede during these times, that's even less time she has to murder and dispose of Kyron.
IMHO, the window of time she would've needed is becoming problematic with the window of time she would've had based on what LE has verified about her day.