It is highly probable that there was a warrant. Why do you claim otherwise, have I overlooked such reporting in the article or elsewhere?
> The warrant lists specific items. This was not respected.
Assuming that fact, was it legal?
[1] https://blog.torservers.net/20180704/coordinated-raids-of-zw...
But that discussion is pretty useless, since our version of the exclusionary rule is more toothless than an American could possibly imagine. Basically, everything found can be used in court.