If any part of KC's DNA is found on the sticky side of that tape, her hair, fingerprints, sweat, saliva, etc., then this tactic won't work for her. Unless she can produce "a nanny" that she gave a key to, who would have had the ability to come in their house, do searches on the home pc for chloroform and neck breaking, then use personal items from the home to kill Kaylee and then place her in the neighborhood, then this tactic won't work for her.
That said;
I do keep going back to something our dear TurboThink keeps repeating:
The last known "REPUTIBLE" person to have seen Kaylee alive, is the Nurse at the Nursing Home in Mt. Dora, and that Nurse has provided a statement to LE & FBI that Kaylee was with CA, not KC.
And then I think about people who are diagnosed with Split Personality. (neighbor is a licensed psychologist and this is a real diagnosis). One personality is the good one, who does good in front of everyone. The other is the bad. The bad personality commits murder and the good personality knows nothing about it 2 hours later. This could be a very real scenario for both CA & KC....
I hope and pray that the FBI & OSCO come up with enough evidence to allow the SA to put the DP back on the table.