I think it's fair to say that these are difficult issues -- they are difficult moral, ethical, legal issues. And one would not expect that everyone would come to a consensus on this.
Just because it's legal doesn't mean it's the right thing to do.
You can do something perfectly legal, but that is inconsistent with the policy or procedures of the department. Just because it's legal doesn't mean it's the right thing to do.
this is a legal matter, it will be handled as such, but it should not surprise anyone that detainees would make false allegations against their captors.