In 1944, he enrolled in the University of Puerto Rico (Universidad de Puerto Rico) and in 1946 became a founding member of Gilberto Concepcion de Gracia's "Puerto Rican Independence Party".
In 1944, Mari Bras enrolled in the University of Puerto Rico (Universidad de Puerto Rico). In 1946, he became a founding member of Gilberto Concepcion de Gracia's "Puerto Rican Independence Party".