"Mujhe insaaf chahiye" says the child's father then vote for tehreek-e-insaaf! It won't bring back your son but will save thousands of kids meeting a similar fate. Can't imagine how the mother in particular must be feeling, i don't want to critisise a young child with basic understanding still he should have thought about his mother before taking his own life.
Suicide is a greater punishment to loved ones left behind then it is too oneself.