In fact, in Illinois there is a specific statute to cover this. The Dept of Corrections can simply dispose of someone's sentence and hand them to ICE for deportation. I knew a Mexican guy who had a 6 year term and I heard from him 6 weeks after he was sentenced -- he was back with his family in Mexico, having had his sentence terminated and quickly deported.
In fact, in Illinois there is a specific statute to cover this. The Dept of Corrections can simply dispose of someone's sentence and hand them to ICE for deportation. I knew a Mexican guy who had a 6 year term and I heard from him 6 weeks after he was sentenced -- he was back with his family in Mexico, having had his sentence terminated and quickly deported.