Maybe, maybe not. I don't remember anyone going through the courts to challenge the government. Maybe it didn't made sense with how broad powers US authorities seem to have when it comes to confiscating property.
I remember there was a guy selling his art on there who raised a stink. He and everyone else of course got nowhere.
US law enforcement seems to enjoy stealing cash from grannies in broad daylight and daring them to sue so there was never a hope.