Edgar Ross

In 1899, Pinkerton agent Edgar Ross accompanies his superior, Andrew Milton, to the Dakota River, where Arthur Morgan is fishing with Jack Marston near Horseshoe Overlook. Milton offers Arthur protection from the gallows if he delivers Dutch van der Linde. Arthur refuses, and Ross leaves with Milton after taunting Jack. Ross next joins Milton at Clemens Point, where the agents offer the Van der Linde gang time to run if its members abandon Dutch. The camp rejects them.

Ross stands beside Milton outside Lemoyne National Bank during the Saint Denis robbery. When the Pinkertons take Hosea Matthews prisoner, Milton executes him and the bank escape becomes a gunfight. Later, Ross and Milton leave a meeting with Leviticus Cornwall in Annesburg. Cornwall demands results against the gang, and Milton tells Ross that their work is not finished.

After Arthur kills Milton at Van Horn, Ross takes command of the Pinkerton pursuit. He brings a large force to Beaver Hollow as Arthur, John Marston and Dutch attempt to escape the collapsing gang. Ross remains out of sight but directs his men to take the fugitives alive and demands that the gang surrender. Arthur and John break through the assault, while Dutch disappears after leaving them behind.

By 1907, Ross has left the Pinkertons and become chief of the Bureau of Investigation. With Agent Archer Fordham, he finds Micah Bell's corpse at Mount Hagen and investigates the man who killed him. Their enquiries through places including Valentine and Rhodes lead them to John at Beecher's Hope. From a ridge above the ranch, Ross and Fordham watch John show Jack how to groom a horse.

In 1911, Ross and Fordham seize Abigail and Jack Marston to force John to hunt the remaining Van der Linde gang members. They escort John to the Blackwater station and send him west. After John deals with Javier Escuella in Nuevo Paraíso, he meets the agents at Ramita de la Baya. Fordham orders him to continue after Bill Williamson, while Ross tells him that Abigail sends her regards.

When John has dealt with Bill and Javier, Ross refuses to release the Marstons and assigns Dutch as the final target. Ross, Fordham, John and the U.S. Army pursue Dutch after rescuing Nastas and disrupting a robbery at the First National Bank of Blackwater. They attack Cochinay with cavalry support. When Dutch falls from a cliff, Ross shoots the corpse with John's pistol so the official report will show that John killed him.

Ross and Fordham return Abigail and Jack to Beecher's Hope, then depart. Later, Ross brings U.S. Army soldiers and U.S. Marshals to the ranch despite the agreement. John and Uncle resist the attack until Uncle is killed. John sends Abigail and Jack away from the barn, then walks out to face Ross's force alone. The soldiers and lawmen shoot John down, and Ross watches before leaving Beecher's Hope with the attackers.