That first killing scene chilled me to the bone. The emotion and images were awesome. Like Laz said, it didn't take a week to read. You really outdid yourself here.
My favorite part had to be how you described the fight between Frank and the owner of the horses. It made the action of stabbing seem like the blossoming of a primitive instinct that would eventually lead to other things.
Great job :)
Just re-read the story, and came to the realization that the ending was perfect...a new hope and a fresh beginning for Frank.