Undocumented Father Got Arrested

My father entered the country illegally about 30 years ago. He lives in Mississippi. He has 3 children (all legal citizens). Saturday he was drinking and driving about 3 hours away. Saw a road block, tried to dodge it but the cops lit him up. He is currently sitting in jail. His charges were DUI, no seatbelt, no signal, no drivers license. We paid his bond but currently has a ICE hold on him? Does this mean a curtain deportation? What kind of lawyer do I need?