The Obama administration has unveiled new proposals for overhauling how immigration prisoners are jailed. On Tuesday, the Department of Homeland Security said nonviolent immigration prisoners could be detained in converted hotels, nursing homes or given electronic ankle bracelets for monitoring. The department also says it plans to double the number of monitors overseeing conditions at government and privately run facilities. Civil liberties advocates have welcomed the proposal but called for a broader review of how immigration prisoners wind up behind bars. Judy Rabinovitz of the American Civil Liberties Union’s Immigrants’ Rights Project said, “It’s not simply about where people are detained. It’s about how they ended up in detention and why they are staying there.”