With Bascom unwilling to exchange prisoners, Cochise and his party killed the members of a passing Mexican wagon train. The Apache killed and ritually mutilated nine Mexicans, and took three whites captive, but killed them later. They were unsuccessful in attempting an ambush of a Butterfield Overland stagecoach. With negotiations between Cochise and Bascom at an impasse, Bascom sent for reinforcements. Cochise killed the remaining four captives from the Butterfield Station and abandoned negotiations. Upon the advice of military surgeon, Dr. Bernard Irwin, Bascom hanged the Apache hostages in his custody. The retaliatory executions became known as the Bascom Affair; they initiated another eleven years of open warfare between the varying groups of Apache and the United States settlers, the U.S. Army and the Confederate Army.