^^
Unless you are a legal eagle I would stay well of such technical matters as admissibility of evidence, in this or any other case.
As I'm sure FL will point out, there will be plethora of reasons why any evidence is admissible or otherwise, most of which will be total mystery to us laymen.
Point of interest, I was involved in a Court Martial (as assistant to defending council) so I got to see the redaction... less than 30 percent of all the gathered evidence was deemed admissible, and even stuff like eye witness reports (including by Harry Staish) were deemed inadmissible for all sorts of reasons.