Walkthrough for Political Realities in Armadillo of Red Dead Redemption.
1. Head to Sheriff's Office marked with M in the map.
2. Follow Marshal Johnson to the Saloon behind him, don't go faster.
3. Call your horse and follow the Red Mark in your map behind Marshal Johnson.
4. Reaching the destination another tutorial will start. Kill the guy in front of you and take cover. Repeat until a guy comes out of the house.
5. Don't kill the last guy in the house you need him alive. Shoot one of his legs and go close to him.
6. After getting your reward from Sheriff, check out dead bodies of the people you killed.
Tip: Whenever you kill someone, you can loot him for some cash and ammo.