Sadly, I think it is because the family is involved. According to the grandparents, the little girl went missing from the house at around 6am and was found at around 9am. The chances of her leaving the house on her own then running into an opportunist attacker are, I'd imagine, very slim. I heard that her mother only found out she was missing, and then found dead, through facebook. Neither the grandparents nor father alerted her.