It is truly tragic that you have had so many associates who have been traumatized at the hands of others. And in many cases the criminal suffered no consequences for their dastardly behavior. Part of the maturation process is that there is a significant lack of equity in the world.. We constanly tell our children that although unfortunate, the "world is not fair" and justice is a limited commodity.Being angry all of the time is extremely draining and does not get you anywhere. What is sometimes helpful is to join a community such as Woman Against Rape. See: www.womanagainstrape.com . It may be helpful to start psychotherapy so that you can rid yourself of this energy robbing rage. You cannot assume responsibility for the acts of others only yourself. You have done all you can with empathy, understanding and even going to the authorities. I wish you the best of luck and good wishes. To recap, I suggest that you begin psychotherapy to give up some of the rage and sense of responsibility and that you join the community of people (e.g. Woman Against Rape) to discuss with like minded individuals the frustration and channel your energies into what is practical.
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