Worth $90m - I think not
Israel's State Attorney's Office claims he took software nasties and vulnerability information worth an estimated $90m and tried to sell it on the dark web for $50m in crypto-currencies.
This exploited what were zero-day holes in iOS and OS X, until the code was identified by Canadian non-profit Citizen Lab and the flaws fixed by Apple
Unless they were planning on using the software to rip-off private citizens, I think their claim of its value is highly inflated. If it was to fight a cyber war, it has no value at all since everyone loses in a war - some just moe than others.
I any case, now Apple had fixed it, it is effectively valueless. Their only case against him is trying to make money from their own illegal activities.