Not only am I not a court of law, but I specifically said that it's up to a court to make a decision of legal guilt here.
In the mean time, yes: the government is allowed to halt activities that it believes are part of an active criminal scheme. Every country with a functioning legal system proscribes this, and establishes a broad swath of controls to ensure that the government can't indefinitely tie up resources.
FWIW, the money sanctioned under OFAC is still that of the owner so there is a process in place that has a semblance of the rules of law. However, getting that money released by the bank is nothing short of a herculean effort based on cases I have seen over the years.
In the mean time, yes: the government is allowed to halt activities that it believes are part of an active criminal scheme. Every country with a functioning legal system proscribes this, and establishes a broad swath of controls to ensure that the government can't indefinitely tie up resources.