Father Margarito Flores Garcia requested to be sent to a parish where priests were being persecuted.
It was during the time of the Cristero War (1926–29), the civil revolt by the Cristeros (Soldiers of Christ) against the anti-Catholic policies pushed by Plutarco Elías Calles, who enforced the anti-clerical articles of the Mexican Constitution of 1917, which sought to eliminate the power of the Catholic Church through persecution and execution.
Not long after arriving in the village of Atenango del Río, he was arrested, roped, and then dragged to be presented to the general, in Tulimán, where the order was given to execute the priest because of odium fidei, hatred of the Faith.
Before the firing squad, Father Margarito Flores Garcia requested permission to pray, kneeled briefly, kissed the ground and stood. The guns fired, blasting his head, on November 12, 1927.