Someone that has suffered a brutal assault that has resulted them in getting raped will most likely be represented by someone in the criminal justice system. The reason behind this is that rape is a criminal offense, and this will basically turn into a whole investigation that will be prosecuted by the district attorney once all has been said and is now out of the way. However, the criminal justice system is not at all perfect, and it is not all that uncommon for the victim of rape to not get the kind of justice that they deserve.
It can be easy to assume that there is no hope when something like this happens, but there is at least one option that is worth exploring which can make the pain that you have gone through somewhat easier to deal with than might have been the case otherwise. You can try contacting an injury law firm practicing in Chicago and ask them if they have any personal injury lawyers who would be willing to give you any kind of legal representation at all.
The great thing about this is that the previous case will not matter. A new justice is going to be assigned to the case, and you can rehash all of the evidence to ensure that at least some modicum of justice is restored. While this might not result in the person that harmed you going to jail, it might at the very least give you some kind of financial compensation which would not change what happened to you but it would help you to live a much more comfortable life that is really quite amazing if you think about it.