A girl killed her parents and stay with their body for four days!

I read a local newspaper today in the morning, and see a pieces of news that shocked me.

A girl who is only 16 years old, killed her parents in their house, and stay with their body until the police knock the door.
She told to the newspaper the reason why she killed them. She lived in a very poor family, her mother is the main source of their family income, she earn money by working for a supermarket, and her father can't work because of desease, he can not even move and have to stay on bed all the time.
here parents were quarrel about money issue that day, and since they always quarrel, so that girl can not stand all this, she then push her mother, and fight with her, but then her mother doesn't move after they fight for while, she realized her mother was dead already.
Her father laying at bed watching them fighting, but can not do anything because of his disease. And then the girl think since her mother has already die, her father should died together with her mother. So she cover a pillow on her father's face, and soon her father is without breath.

her neighbour found that their house is wierd because nobody come out for many days, so he called the police, and when the police found all these, they feel surprise too!