 However, the plan was signed by twenty-three people, including Aguirre, and one other man believed to be Tomas Urrea, the father of the revolutionary Teresa Urrea.Because Tomas Urrea had close relations with many of the people involved in the uprising, Teresa Urrea was suspected of being the mastermind.Sixty to seventy Yaqui, Pima and Mexican revolutionaries, many of them employees of the Southern Pacific Railroad, united in a rebel band calling themselves "Teresitas" to participate in a raid, with the goal being to "capture the arms, ammunition, and money in the Mexican custom-house at Nogales."