By Nikolay Chsherbinin ( May 30, 2018, 8:46 AM EDT) -- Immigration detentions of non-citizens must only be for an immigration-related purpose. Undoubtedly, a detention is never pleasant. However, it is not the detention itself, or even its length, that is objectionable, but its unlawfulness. Often non-citizens are being detained on a faulty factual premise, inadvertent errors or criminal charges without a conviction. Once detained, it is difficult to secure a release and the detention can span years....