Why not a hair of KC's? If the hair is stuck to the inside of the tape, KC put the tape on. Also there will be prints, because how do you use tape with any kind of gloves? This will be the final nail. I do have a theory without holes in it, but is it true? Probably not.
I agree the hair is incriminating. The defense will say it was transference. The hair could have been on Caylee's hair or clothes. If it was the same duct tape she used for the party then her hair could have been caught on the duct tape.
Surely duct tape can be put on with gloves. I will have to try it some time.
I would love to hear that theory.