Au contraire. Mudd was well-acquainted with Booth, and numerous witnesses placed the two of them together several times in the year prior to the assassination, as well as with John Surratt and other conspirators. Mudd lied to investigators, repeatedly, about what he knew of Booth, and was caught concealing evidence.
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.
The atmosphere surrounding the assasination was such that a rush to judgement occurred. 17 or 18 indiviuals were hung as consiprators but Mudd received a life sentence. In 1869 Andrew Johnson pardoned Mudd. What do you know that Johnson didn't?