The Axeman's Killings

It's supposedly said Mrs Marsia will sit up late tonight just like Mrs Tony. How could this nut have been written blocks away from the house in blood? It's quite a long nut and forgive me for how graphic this is. But he would have literally had to like bottle some blood from the crime scene and take it blocks away. And I think it's very important to his race here because the only reason that they really give was that he worked at Louis Bessemer's bakery earlier on.