James Cooksey Earp was a lesser known older brother of Old West lawman Virgil Earp and lawman/gambler Wyatt Earp. Unlike his brothers, he was a saloon-keeper and was not present at the Gunfight at the O.K. Corral on October 26, 1881.

Virgil Walter Earp was both deputy U.S. Marshal and Tombstone, Arizona, City Marshal when he led his younger brothers Wyatt and Morgan, and Doc Holliday, in a confrontation with outlaw Cowboys at the Gunfight at the O.K. Corral on October 26, 1881. They killed brothers Tom and Frank McLaury and Billy Clanton. All three Earp brothers had been the target of repeated death threats made by the Cowboys who were upset by the Earps' interference in their illegal activities. All four lawmen were charged with murder by Ike Clanton, who had run from the gunfight. During a month-long preliminary hearing, Judge Wells Spicer exonerated the men, concluding they had been performing their duty.