Dr. Mudd was imprisoned at Ft. Jefferson on Dry Tortugas.
Don't recall whether he died there or not. I'm thinking that he was released prior to his death.
I do recall Roger Mudd, newscaster, announcing that Dr. Mudd was pardoned, exonerated, something like.
If I remember correctly, Mudd was pardoned because of his medical attention to patients during an epidemic.
"Dr. Mudd was imprisoned at Ft. Jefferson on Dry Tortugas."
While in that subtropical prison, Mudd used his medical skills to help treat prisoners during an outbreak of some tropical disease (malaria, yellow fever, or some such). His conduct was so heroic that he was pardoned.