Law enforcement should be involved, but I don't see a need to freeze the account. This isn't like some crime scene where you have to lock down the physical environment while evidence is collected. Bter has a complete record of any transactions and any other details related to the account, so they can return the NXT to the rightful owner without losing any evidence at all. No need to tie it down in judicial bureaucracy for God knows how long.
Yes, time can be a problem. Maybe they should release funds.
But I have a feeling, they are doing it because they are not comfortable with police investigating bter; and free advertising too.
Anyway, I will shut up now. I wish klee gets his funds back and it's actually not my business how he or bter will do this.