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Something something Hellhole Prison.
A type of Morton's Fork- both choices end in prison, but one does not also return him to a country he probably left for a reason.
This could become a choice between the Lesser of Two Evils with a shift in perspective or circumstances- say, for the prosecutor the decision is framed as a choice between deporting a witness for testimony that could convict a serious crime, or allowing him to falsely change his testimony and potentially let a dangerous criminal go free without that testimony.
A person on the witness stand is asked, on cross examination, about an incident several years earlier; he then basically claims all his prior testimony was a lie. It later turns out that the incident in question was a crime he comitted before becoming a US citizen; a conviction for that past crime would cause him to lose his US citizenship and be deported to Syria, while the worst he could get for changing his testimony is being sent to prison in the US where he is still guaranteed certain rights.