This keeps happening, so:
JAIL is where defendants are held pre-trial or (in MA) people w/misdemeanor convictions are sentenced to
PRISON is (in MA) where people w/felony convictions are sentenced to
ICE DETENTION is neither of these things (even if it happens to be in a jail)
JAIL is where defendants are held pre-trial or (in MA) people w/misdemeanor convictions are sentenced to
PRISON is (in MA) where people w/felony convictions are sentenced to
ICE DETENTION is neither of these things (even if it happens to be in a jail)
ICE arrests/detains pending DEPORTATION proceedings in #immigrationcourt, in which detainees are charged with CIVIL violations of the federal imm. law ranging from unlawful presence (if undocumented) to prior convictions for deportable offenses (if documented). No criminal aspect
So yes, people with greencards can be arrested and held in a Massachusetts jail BY ICE for minor decades-old drug convictions for which they have already paid in jail time/probation/fines, etc. Happens all the time. But they are *not being charged with a new crime.*
I know this isn't something that most Americans have never had much reason to think about, so I don't want to go too hard even on people like Balls here who tell me that my entire life/career experience of the past 14 years was some kind of weirdass nightmare. Most of the time. 
(Also, since I may not have been clear enough about this: ICE rents space in county jails in places like MA in which there either are no private prisons or not enough space in existing ones. Which is why someone in ICE custody in Bristol county jail is not "in county lockup.")
