Juan Casas

Juan Casas was a member of Admiral Harry Morrow's command team at Starfleet Command, San Francisco, Earth and was assigned as a security officer to the USS in 2285. (Star Trek Grissom)

Casas was killed in 2285 when the Grissom was destroyed by a Klingon Bird-of-Prey. 

Chronology

 * 2252: Born in Cordoba, Andalucia, Spain Earth.
 * 2285: Dies in orbit of the Genesis Planet in the Mutara sector