Cooperforth works as a guard at Cornwall Kerosene & Tar.
Events of Red Dead Redemption 2
In the mission An Honest Mistake, Cooperforth, alongside Lowe and another guard, likely their supervisor, is sent to Compson's Stead with the order to search the place for Uncle, Bill, Charles, and Arthur, who have robbed a coach of Leviticus Cornwall some hours before. After threatening a squatter at the house's veranda, Cooperforth and Lowe are sent to the shack the four coach robbers are hiding in to check it. After Bill blows the gang's cover by knocking over a bucket, Lowe is promptly killed by Charles and Copperforth gets shot by either Arthur or Uncle.
Red Dead Redemption 2