In 1980 El Salvadoran Archbishop Oscar Romero spoke out against the repression of the Salvadorean people.  One day later, he was murdered by a right-wing death squad for speaking truth to power.  Below is a link to a video about Romero as well as a clip from the film “Romero”, which contains the speech that got him killed:

The Murder of Monsenor, Part One

The Murder of Monsenor, Part Two

Speech from “Romero”