My guess is that "United States vs Bitcoin wallet" could be an instance of civil forfeiture, where instead of going through the steps required to prosecute someone, US authorities are putting literally money in the defense position and effectively automatically taking it. Which yields some tragically comedic titles like: The United States Government vs $25,180 in United States Currency.
It's a total defecation on the 4th amendment is what it is.
edit:
What I mean is that the concept of civil asset forfeiture is a legal circumvention of the protections the 4th amendment is supposed to provide. The practice itself is probably illegal and should be challenged, and there should be a lot of uproar about the practice.
I hope the bitcoin wins.