Amazing Photo: Fully Vested Priest Being Executed by Firing Squad

I recently came across this amazing photo of a fully vested Mexican priest (far right) being executed by a firing squad (far left):

Does anyone know who this priest was or the story behind this photo?

Godspeed,
Taylor Marshall

PS: How honorable is it that the Padre is wearing a biretta to his death? By the way, the black hat is a sign of jurisdiction and is worn in ancient courts by judges when they pronounce a death sentence. Spiritually, this priest is pronouncing the spiritual death of his persecutors (and probably praying for them, as well).