Earlier quoted context omitted.
"Evidence" isn't just "the parts of the evidence the prosecution wanted to use". How is the defense supposed to cross-examine the person who gathered the evidence when they can't investigate the circumstances under which it was gathered? How are they supposed to make a cogent argument that it was not a properly issued warrant unless they can see it? How are they supposed to argue that even if the the warrant was prop…
I understand the argument, but is that what actually happened here? My understanding is that the one thing the defense doesn't have is the whole justification for entering the defendant's personal space in the first place. I could be misreading!
(Example! The warrant included Device X, because Secret FBI Source Y said it had classified information. The device was searched, but contained no such information; in fact it had been completely wiped. This lets the defense argue that the FBI knew the source was unreliable, or that the evidence found was exculpatory (eg, evidence the target had been hacked to plant the child porn). None of this is available to the defense.)
The government says that the evidence gathered in the warrant has been made available. They could very well be lying, or simply mistaken, and it's impossible to investigate. Regardless, it is only part of the issue.
The process here is that the judge looked at it the government's arguments, without involving the defense, and said "yeah, it looks good, trust me / them".
(Which, incidentally, is completely contrary to the notion of the judge as a neutral arbiter rather than an inquisitor working for the government. Not surprising when the FISA court itself essentially operates in that capacity.)