I'm a US citizen, and this news, of course, is horrible. However, whether the young girl is guilty of a crime depends on when she killed him. The news article, and none of the reports I've heard on TV, doesn't say.
If she killed him while he was in the act of raping her, or immediately after he raped her, or even if he attempted to rape her or told her he was giving her to a "client," that would be considered self-defense and there would be no crime.
If she killed him the next day, or several days after the rape, that could be considered aggravated manslaughter or justifiable homicide.
If she killed him the next month or year, that could be considered premediated murder.
But, as for the civil penalties, the $150,000, I don't know why that would ever be awarded in the case of the first two timelines.