I don't. Treating witheld/secret information as like spoilation would mean an assumption that whatever cannot be presented would be adverse to their side of the

I don't. Treating witheld/secret information as like spoilation would mean an assumption that whatever cannot be presented would be adverse to their side of the case. Which is to say they could basically say "we can't have this info in courts," and the courts would say "okay, we believe you, but because this information is effectively withheld, and that information would be crucial to the case, we will proceed with summary judgment favoring the other side in areas impacted by said evidence" or something similar. I'm saying they can make the excuse, but there'd be cost pretty much.