It's interesting to me when you say "I've got to stop reading stories like this." You know you won't. You know that the ONLY way to fight this kind of thing is for the more people to know, and to talk about it and to be outraged about it - is the only way to get the awareness out and for people to keep their eyes and ears open to stop things like this from happening in the future.
You'll keep reading, keep being outraged, keep talking about it. At least I hope you do.
Years and years ago, no one talked about child abuse and nothing was done. Now there are agencies to help. Years and years ago, no one talked about spousal abuse, and now there are agencies to help - because people are talking.
But also, the more you read this stuff, the more you appreciate your own families and children, and the more you can instill in them the repulsiveness of this behavior and prevent it in the families of your children for years to come.
It's hard on you, but every little bit helps.