Emiliano Zangora.
Emiliano Zangora was the assassin of Mexican President Pedro Hermión. Zangora was originally a devoted member of Hermión's personal guard. However, he was denied promotion for what the Fuentes Commission called "good and sufficient reason", and he vowed to avenge himself on Hermión.
On 19 June 1851, after Hermión gave an address to the Congress in which he vowed to carry on the Rocky Mountain War to final victory, Zangora, looking on from a position in the gallery, shot him in the back of the head, killing him instantly. Zangora ran from the back of the hall yelling "Viva Huddleston y Paz", but before he could escape he was shot dead by the Congressional guard.
The Fuentes Commission concluded that Zangora was "a single assassin, operating alone, apparently half-crazed". Despite this, Sobel states that there are still people who believe that former President Miguel Huddleston arranged the assassination, while another group believes that Governor-General Henry Gilpin of the Confederation of North America was behind Hermión's death.
Sobel's sources for Emiliano Zangora's assassination of President Hermión are the Commission to Inquire into the Assassination of President Pedro Hermión: Final Report (Mexico City, 1852); Joan Kahn's The Unknown History of the Hermión Assassination: The Gilpin Connection (New York, 1968); and Samuel Menzer's The Huddleston Conspiracy: The Brown Menace of 1851 (London, 1970).