Walkthrough for Hanging Bonnie MacFarlane of Red Dead Redemption.
1. Go to Marshal's Office marked with M in the Map.
2. Follow the Marshal to Bonnie's location.
3. After getting down your horse, follow Norman with your gun point to his head.
4. As soon they open fire, kill Norman and take cover. You need to go as fast as you can to save Bonnie.
5. When the cutscene with Bonnie getting hanged ends, go to her location marked with Blue Dot in the mini-map and shoot the rope to save her.
6. Kill rest of the outlaws and then head to Bonnie to trigger another cutscene.