The judge will more than likely reserve judgment in order to give a written decision because of the complexities of the case. The actual decision will probably be made sometime in April or May.
And remember that Mr. Ng hasn't spent any time behind bars. Mr. Ng was released back into the community, and he has very strict restrictions. He is not to be in possession of his passport, so that he can't travel. Of course, he had false passports manufactured for these women in the group that he is involved in, so how hard will it be for Mr. Ng to get a false passport?
So those are some of the restrictions. We don't understand why he wasn't held in custody.