In Britain 'dumb' is seldom used to mean stupid. It was mostly only used to mean mute e.g 'deaf and dumb'. However 'dumb' in the mute sense is probably politically incorrect nowadays, a bit like calling a short person a 'dwarf'.
Luis Carlos MontalvÃ¡n at a book signing in Coral Gables, Fla., in 2011, with his service dog, Tuesday. Luis Carlos MontalvÃ¡n, an Iraq war veteran and best-selling author who toured the country with his service dog, Tuesday, as an advocate for soldiers with post-traumatic stress disorder, died on Friday in El Paso. He was 43. He was found dead in his hotel room.
On November 25, 1960, three of the four Mirabal sisters were killed by the dictatorship of Rafael Leonidas Trujillo, setting up an uproar in the country that ultimately led to the assassination of the dictator in May 30, 1961.