Assuming she was indeed pregnant (as far he he knew, she was) -- the baby inside her had nothing to do his/her mother's actions. Once he became aware that she was pregnant, he had a responsibility to the baby.
If a criminal takes a human shield you can't just blow them both away, especially if the human shield is an innocent baby.
94 posted on
07/24/2014 4:26:58 PM PDT by
Wyrd bið ful aræd
(Asperges me, Domine, hyssopo et mundabor, Lavabis me, et super nivem dealbabor.)