The sex difference in parental child homicide depends heavily on the child's age and the circumstances of the killing. Mothers and fathers are roughly equal for infants, while men account for more filicide overall and substantially more killings of older children and family annihilation.

That said... it hardly matters to me. If its about justice, these people have to be dealt with. Institutionalized, imprisoned, whatever it takes. Its obvious they can't be part the civilized world.