From Abp Rummel's entry in Wikipedia:-
"On April 16, 1962, the Monday before Easter, he [Rummel] excommunicated three local Catholics for defying the authority the Church and organizing protests against the Archdiocese.[16] The first of the three was Judge Leander Perez, 70, a parish judge from St. Bernard Parish, who called on Catholics to withhold donations to the Archdiocese and to boycott Sunday church collections."