Results in on the duct tape:
Henkel's: "Skull tape" and gas can tape a unique brand / variety.
Fingerprint unit: No latent prints found. Not surprising as the tape was in the elements for six months and described as "degraded" in nature.
DNA unit: No DNA belonging to KC or Caylee. If no DNA of Caylee found, then no surprise KC's was not found either. Just too much time in the swamp. There was a DNA sample identified as belonging to FBI examiner. A second sample was limited in nature, but cannot eliminate a second FBI examiner as the source.
Chemistry unit: "Skull tape" composition consistent with gas can tape.
Trace evidence unit: Composition of fiber backing found in "skull tape" differs from gas can tape. A visual, microscopic comparison was done - nothing more. Not surprising as the fibers have a large cotton component. Degradation of "skull tape" will result in different fiber composition. Example: if the cotton fibers in the "skull tape" rot faster than the gas can tape, the ratio of cotton to polyester in both tapes will differ as a result. An analyst must conclude that the composition differs. They cannot speculate what the composition might have been prior to exposure to the elements.
Questioned documents unit: No results yet. This unit will tell us if the dimensions and manufacturing process for the tapes are consistent. Fundamentally, we will want to know if there are any differences in the fabric weave.
IMHO, the "evidence" (or as Mr. Conway would correctly refer to it - "discovery") released today sheds no real light on the comparison between the "skull tape" and the "gas can tape".