"Mark from when I was hung? No. I have no scars anymore." Booker had no idea what Marcus was talking about. He didn't have any scars anymore. Since he woke up from death his body simply didn't get marks.

He really hated the sensation of regrowing teeth. That was probably the worst one.

Booker had cursed his immortality very shortly after learning what it was and its limitations. He wasn't going to pour that grief on Marcus because he was a stranger.