People have been killing children for years. We the public just never heard about it as much unless the people were famous like the Lindbergh baby. Now it seems that both the victims and the killers are getting younger and younger. Like the two 10 yr olds in the UK who kidnapped a two year old from a mall and beat his head in with a rock because he cried.
When I was a kid I used to play outside with my friends till dark. Never worried that something bad would happen to me.
Now bad stuff happens with such regularity that it hardly makes the news.
This one happened on the 23rd. Never made the news up here. "Two teenage brothers were being held on Thursday in the stabbing deaths of their parents and three siblings — ages 12, 7 and 5 — in their home in a suburb of Tulsa, Okla., the police said."
http://www.nytimes.com/2015/07/24/us/teenage-brothers-accused-of-killing-parents-and-3-siblings-in-oklahoma.html?_r=0