Let's be serious, how can you know if someone is actually a child's parent or if they are a human trafficker? In cases where you are not sure then isn't the only right thing to do to separate them until you can figure it out for sure?
The detention facilities you have seen house children for 3 days maximum, the maximum can be extended to 5 days when there is a backlog, that is not indefinitely.
And the vast majority of the kids temporarily housed in those facilities were not separated from their parents, they came alone.
What has been done for what purpose?