David's father died when he was only a year old. He entered the
seminary at Durango when very young, but had to leave to help
support his family by working as a miner; never returned to seminary,
and remained a layman. Worked with Saint Luis Batiz in his local
parish. Joined Catholic Action (ACJM), and served as its president
in 1925. Worked against the government's anti-religion laws. Vice-president
of the National League for the Defense of Religious Liberty (LNDLR).
On 29 July 1929, a LNDLR meeting drew a crowd of over 500. A
few days later a group of soldiers gathered up the LNDLR officers,
and announced they were taking them to the state capital to explain
their position. After leaving town, the soldiers stopped the cars
and accused them of plotting armed revolt against the government.
David was offered his freedom if he would recognize the legitimacy
of Calle's anti-religious government; he declined. Martyred with
Saint Salvador Lara, Saint Manuel Moralez, and Saint Luis Batiz.
One of the Martyrs of the Cristera War.