Spanish to English Social Sciences History Crime

I've asked this as an English monolingual question as well, but I would like the opinions of my Spanish/English colleagues.

In the text, "infanticida" is used to refer not to the crime but to the perpetrator. English dictionaries accept "infanticide" as either the deed or the doer, but I *never* hear such usage. I have avoided it previously with the phrase "infanticidal mother," but that doesn't work here:

"Esta necesidad de erradicarla [o sea, a la mujer que mató a su bebé] literalmente de la sociedad parece estar asociada a la dificultad de conciliar categorías tales como mujer, madre e **infanticida** contumaz y a la amenaza que esto representa para el propio tejido social."

The text is an article for a History journal on the only woman to be sentenced to the gallows in Puerto Rico, ca 1905.

I can't uses "infanticidal mother" again because the translation of "infanticida" needs to be parallel to the other categories: woman and mother.

Ideas?