hi Svein Ommundsen,
Greetings, I'm a movie enthusiast who watched many movies. coming to the plot with which you described we can weave tons of stories with different genres(like crime, thriller, action, drama), as you have mentioned a movie for American marked.
I can give you 3 versions of the story adaption based on your clues with following core values brotherhood, love and compassion with Drama-Comedy, Crime Thriller, and action thriller. Based on your choice of genre and other inputs of character you wish to see, we can develop a good story.
thanks and Regards
Hemanth Reddy