That was the best part! The exorcism part was due to her very religious parents couldn't grasp why their daughter was so messed up, so they were convinced that she was possessed, same with the minister. But in reality she was probably a sociopath with violent tendencies. There was a case of a 10 year old girl who strangled and killed infants, because she thought it was funny, and then taunted their families about it. It does happen...truth is stranger than fiction.