the answer is: i don't know for sure. i'm inclined to believe the US Army MAJ, who was Chief of Custody & was within sight of CPT Wirz for the last 24 hours of his life (he actually slept "a few hours" in the cellblock).
free dixie,sw
But it has to be one of them, right? Jefferson Davis either lied about getting such a letter from Boyle and made up the whole thing that he reprints in his book, or he was duped by a fake letter. Lewis Schade, Wirz’s lawyer, who wrote a letter talking about a conversation with Father Boyle must have been lying, right?