Walkthrough for The Prodigal Son Returns to Yale of Red Dead Redemption.
1. Go to Mc mark in the Map to meet Harold MacDougal at the Blackwater (Great Plains).
2. Go up the roof and save MacDougal with your Dead Eye ability.
3. Kill everyone around you.
4. After killing every enemy on top of the roofs, follow MacDougal and mount up your horse.
5. Protect him until you get to the train station.