Why would you freeze the account in the first place, just let it between the police and the ftards that send their bitcoin to a random dude on the interweb.
I don't know laws of your country of residence, but in my country I have the right to stop a crime if I have reasons to think a crime is happening. Even more, I get extra protection from the law in this case. So I took an
active position in this very case by providing technical assistance to the company which sold iotas.