it's more common than you think. and what's worse, there are several places in the world where murderers like these aren't really prosecuted, or they get off with a slap on the wrist, because just like in this article, it's accepted in the culture.
amnesty international has a good campaign against it. it falls under their "stop violence against women" campaign umbrella:
http://www.amnestyusa.org/page.do?id=1108230