With the recent rerelease of Red Dead Redemption, including a first-time PC release, many new players are getting to explore John Marston for the first time. Like Red Dead Redemption 2‘s random events, players are able to find a treasure map after saving an NPC from a bandit attack. Alternatively, they can loot the map from the NPC’s body if they are unsuccessful in saving him. Like many other encounters, this one is best found by keeping an ear out for a cry for help and investigating the situation.

https://screenrant.com/red-dead-redemption-1-all-treasure-locations/