In June 1980 , an illegal gathering dubbed '' Día de la Patria Española '' and organized by the Milá on behalf of the Youth Front , ended with the assault and arson of the Barcelona Union of the Democratic Centre ( UCD ) headquarters . The Barcelona Supreme Court ruled that Milá was the main inductor of the demonstration and sentenced him '' in absentia '' to a two-year prison sentence . This formal indictment forced Milá to flee for France , where he was investigated in connection with the Copernicus street synagogue bombing in Paris , which claimed four lives . He was sentenced to three months imprisonment in La Santé for his use of forged documents . During his time in prison , he wrote an apology letter to Blas Piñar in which he assured his return to the Catholic faith , as shown in the documents compiled by Piñar himself in '' Escrito para la historia '' ( Fuerza Nueva Editorial , 2000 )
Copernicus street synagogue
1980 Paris synagogue bombing
Ernesto Milá