Actually similar cases happen in USA too, just type in good, father, mother or parent kill son/child, and you would find lots of reports like these from USA.
I'm only posting it a out Pakistan, because it is more related to the topic.
American Fork Father Shoots, Kills Five-Month-Old Son
By Chris Miller
(KUTV) A single gunshot rang out in a quiet American Fork neighborhood Friday afternoon around one o'clock. "I was napping when I heard it," said Donnett Beamsderfer, who lives nearby. The bullet struck a five-month old baby boy, killing the child instantly. "It's very heart-wrenching to hear those kind of things,” said Donnett.
American Fork Police arrested the child's father, Joshua Petersen, and booked him into the Utah County Jail on suspicion of aggravated murder, a first-degree felony. "Through our investigation we learned that Josh's intent was to kill his son and then, in turn, kill himself," said Sergeant Gregg Ludlow of the American Fork Police Department.
Police say Petersen was tackled by a family member before he could pull the trigger on himself.
"We were out walking the dog and we hear this thing and see this and it's so unsettling right in my neighborhood," said Fran Keller, a neighbor.
Police are still trying to piece together how something like this could happen. "It's a very good family, a very good neighborhood," said Sergeant Ludlow. "This is an isolated incident."
Neighbors tell 2News that Petersen lived in the house, along with his children, his wife and his in-laws. One of them stopped him from taking his own life, but wasn't able to stop him before taking the life of the child.
(Copyright 2013 Sinclair Broadcasting Group)
http://http://www.kutv.com/news/top-stories/stories/vid_4457.shtml
