Felicitas Sanchez Aguillon, who also appears in the records as Sanchez Neyra, was born at Cerro Azul in Veracruz in the 1890s. She trained as a nurse in the port of Veracruz and practised as a midwife, and moved to Mexico City around 1910, settling in the Colonia Roma at Salamanca number nine. The Mexican press called her la Ogresa de la Colonia Roma, the Ogress of Colonia Roma.
Under cover of the midwifery she ran two illegal businesses from the apartment: abortions, in a country where they were prohibited, and the placing of infants with couples for a fee. Both gave her a supply of newborns whose disappearance no one was in a position to report.
The case broke through a blocked drain. The pipe was packed with foetal remains, and when police searched the apartment they found needles, baby clothes, candles, dozens of photographs of children and an infant's skull. She fled the same day. It was her accomplice, a plumber named Salvador Martinez, who then gave the account of what had been going on.
The Mexico City press of the period gave her several names, among them the ogress of the Colonia Roma, the dismemberer of the Colonia Roma, the stork-scarer, and the one that stuck, la trituradora de angelitos, the grinder of little angels.
The figure attached to her, between forty and fifty and in some accounts more, cannot be confirmed and never was. What the record shows is narrower and is the more important fact about this case: when she was processed on April 26, 1941, the charges were abortion and illegal burial. She was never tried for murder. She died in the Colonia Roma on June 16, 1941, some weeks later, so the murder allegations were never tested in a court at all.