Anne Perry

I have now completed 10 books in my effort to re-read all the Anne Perry "Inspector Monk" books.  The one I finished last night is The Silent Cry.   Hester is nursing a young man, Rhys Duff, who was badly beaten in the slums of London.  Rhys can no longer speak and his father was murdered in that same beating event.  What is going on here?  Why are these gentlemen hanging around the slums and who is responsible for the random beatings and rapes of women in these areas?  Will street justice be meted out, or will Monk find enough information to bring a case to court?  Did Rhys murder his own father?  What is the secret that is keeping Rhys from talking?