Dr Mudd was convicted and sentenced to live as a conspirator to the crime but his only "sin" was providing a doctor's care to a person who he didn't even know let alone conspire with.
He was pardoned in 1869 by President Andrew Johnson but his name became a colloquialisn, "Mud" thereafter!
Correct me if I am wrong but wasn't there someone who put Booth up for the night and tended his wounds/injuries not knowing he was being pursued for the assassination, and who was later tried and hanged?
IIRC news of Lincoln's assassination did not reach the countryside until many many days after the fact so people could not possibly know Booth was on the run for that crime. Yet people that aided him were imprisoned, hung or both.
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.
Doctor Mudd wasn't as innocent as you'd like go think. You might want to read Michael Kauffman's "American Brutus," and get the total details of Mudd's contacts with Booth. It's an in-depth study of the evidence collected at the time of the assassination. Mudd had met Booth on several occasions, and Booth had even spent the night at Mudd's home in the months prior to the assassination. It was Mudd who introduced Booth to John Surratt, and Mudd also managed to introduce Booth to various people connected to the Confederate cause. These same people, Booth would later tap for help in his attempt to escape south. If Mudd knew Surratt, then he was knee-deep in pro-Confederate activities, and may have even known about the plot to kidnap Lincoln.