The foster care system is definately ripe for abuse, but unfortunately there are a lot of terminally ill children in the system who must be cared for. Typically children like this have in home nurses (according to the article this girl does too), and frequent medical intervention. These types of children tend to have more outside eyes on them than regular foster kids, and that extra oversight is good to help ensure they are being cared for and not abused. It's good to be aware of potential areas for pedos to have access to kids, but this story seems legit. He seems like one of the good ones.