Yes.
BTW. OP is not the only killer to successfully shoot victims that they cannot see that are behind a door. A two minute Google review pulled up pages of similar shootings, I grabbed a few for the Forum!
http://www.denverpost.com/news/ci_24504890/woman-shot-through-door-her-home
http://www.cbsatlanta.com/story/19338567/woman-shot-through-door-of-northeast-atlanta-home
http://www.examiner.com/article/man-charged-with-murder-of-woman-shot-through-door-of-home
http://www.suntimes.com/news/crime/...gh-door-of-oak-park-apartment-police-say.html
Um, that kind of proves my point. Killing someone through a door isn't exactly a feat of skill. You fire, you hit. I don't know why it would have to involve the ability to "track a voice." (Gets more ridiculous every time I type it...)