This brief account is from the EWTN website:
Miguel Pro was born January 13, 1891, at Guadalupe Zacatecas, Mexico. From his childhood, high spirits and happiness were the most outstanding characteristics of his personality. The loving and devoted son of a mining engineer and a pious and charitable mother, Miguel had a special affinity for the working classes which he retained all his life.
At 20, he became a Jesuit novice and shortly thereafter was exiled because of the Mexican revolution. He traveled to the United States, Spain, Nicaragua and Belgium, where he was ordained in 1925. Father Pro suffered greatly from a severe stomach problem and when, after several operations his health did not improve, in 1926 his superiors allowed him to return to Mexico in spite of the religious persecution in the country.
The churches were closed and priests were in hiding. Father Pro spent the rest of his life in a secret ministry to the sturdy Mexican Catholics. In addition to fulfilling their spiritual needs, he also carried out the works of mercy by assisting the poor of Mexico City with their temporal needs. He adopted many disguises to carry out his secret ministry. In all that he did, he remained filled with the joy of serving Christ, his King, and obedient to his superiors.
Falsely accused in a bombing attempt on the President-elect, Pro became a wanted man. He was betrayed to the police and sentenced to death without the benefit of any legal process.
On the day of his death, Father Pro forgave his executioners, prayed, bravely refused the blindfold, and died proclaiming "Long Live Christ the King!"
Our God and Father, who didst confer upon thy servant Blessed Miguel Agustín Pro the grace of ardently seeking thy greater glory and the salvation of others: grant, through his intercession and example; that by faithfully and joyfully performing our daily duties and charitably assisting those around us, we may serve thee with zeal and ever seek thy glory; through Jesus Christ thy Son our Lord, who liveth and reigneth with thee, in the unity of the Holy Spirit, ever one God, world without end. Amen.