He has a feeling that John isn't his real father actually when he looks at himself. He thinks his real father is either Dutch Van Der Linde or Javier Escuella. But he is not sure.
I am Jack Marston. I am 19 years old. It's 1914 and war has raged across Europe. I have an deathwish as my mother died this year, and my father died 3 years later. I have become an outlaw which defeated the purpose of my family's sacrifices. I sometimes call myself "John Marston Jr." when i am shooting up towns.
Netwrck 
