Mom Kills Children Again

[Sharkey]

This seems to be happening more and more. This is the second one of these in the last few months both very close to me.
What is so bad? I just don't understand.
http://fox2now.com/2012/09/06/three-children-woman-dead-in-possible-murder-suicide/#ooid=I2aWd0NTreiba_05DPQ-_zHihmyw1OW_

Previously this year
http://fox2now.com/2012/03/17/three-children-and-one-adult-found-dead-in-bourbon-mo/

Just a few months ago
http://www.foxnews.com/us/2012/08/03/st-louis-area-mom-killed-herself-2-kids-police-say/