The most famous prisoner held at Fort Jefferson in the Dry Tortugas was Dr. Samuel Mudd. He was a physician convicted of conspiracy in the 1865 assassination of President Abraham Lincoln for treating the broken leg of John Wilkes Booth during his flight from Washington. Mudd arrived at the remote island prison—located about 70 miles west of Key West—in July 1865 to serve a life sentence. Despite his status as a notorious prisoner, he eventually earned a pardon from President Andrew Johnson in 1869. This was largely due to his heroic efforts in saving dozens of lives during a yellow fever outbreak at the fort in 1867, where he took over as the chief medical officer after the fort's surgeon died. Today, visitors to Dry Tortugas National Park can still view the specific cell where Dr. Mudd was held, which has become a focal point of the fort's historical tours.