This whole duct tape scenario has my mind reeling for several reasons:
a: even if the labs conclusively declared the pieces of duct tape as an "exact" match, Baez would still be calling it circumstantial, because KC's prints were not found on them.
b: The mere fact that he is now making such a big deal out of this duct tape in my mind shows he feels it is significant enough to tie KC to the crime - and if more information/tests come out in the coming days, he won't be able to backtrack on the importance he's given in this piece of evidence.
c: The defense keeps saying "the truth will come out at trial" yet with the thousands upon thousands of pages that have come out since the most recent dump, JB and his crew come out NOW and say there is no evidence to prove she committed the crime. So up to this point, we can only assume JB and the crew haven't been able to find ANYTHING to support their client's innocence. We know all of the evidence is not out there yet, so what gives? Seems sloppy and careless to me.
d: This whole duct tape nonsense seems to be a diversionary tactic designed to pull our thoughts away from everything else looming in the case. What about the Winnie the Pooh blanket she was found with? With no prints on the duct tape, isn't Caylee's bedding from her room just as significant as a piece of duct tape from her garage?
e: and then of course, there is all of the other evidence that we haven't heard a reasonable explanation for yet - the fact that she just randomly abandons her car, that happens to smell like human death to every member of her family. Visits to a missing children's website months before, the fact that Caylee's body shows up in her childhood hangout, countless lies, including lying about a pregnancy that her burgeoning belly can't even keep under wraps, etc, etc, etc.
It just kind of blows my mind JB can think his case is going to be dismissed because they can't find fibers on a waterlogged piece of duct tape that was rotting in a swamp for several months.