A thought experiment:

You are a judge responsible for carrying out these reviews. The police have detained someone and you agreed to that three weeks ago and two weeks ago. In the third week you felt no progress had been made and made this clear to the police. Now you question the police again and are not satisfied that they have found any more solid evidence all over the last fourteen days. Nor are you convinced they are likely to.

Being both human and intelligent, you are aware of what the outcry would be if you ordered his release and he then went on to commit some atrocity. On the other hand, you not satisfied that any evidence is likely to appear, but you know that if you let things continue for longer few people are likely to complain much. After all, even the accused isn't party to your doubts.

Have you the courage to order his release?