Court Pauses Deportation of Seamus Culleton
Culleton entered US via visa-waiver program and was arrested in Massachusetts.
Culleton described ICE detention in El Paso as a 'concentration camp'.
US DHS claims Culleton had final removal order and was offered Irish removal.
Tricia McLaughlin said Culleton chose to stay in detention.
Court may test visa-waiver overstayers' right to contest removal.
3 hours ago