Want to locate novel about therapist (not called that) who uses empathic abilities to rehabilitate hardened criminals on a prison planet (or space prison). Futuristic and humanistic ideas of justice and individual worth.
You don't give a lot of information, but a possibility is The Fear Principle by B.A. Chepaitis published in 2011.
Dr. Jaguar Addams knows about fear. On a satellite prison called Planetoid Three, she establishes a telepathic link to her subjects. She confronts their demons. And makes them her own. They were known as the Killing Times, when serial murder reached epidemic proportions. Victims of hard-edged crime demanded hard-wired punishment, and the new prisons were born. Now one determined woman, a survivor of that dark age, tries to rehabilitate killers by tapping into the source of their obsessions: their worst fears. Her name is Jaguar Addams, and she is about to face the most challenging subject of her career. The ultimate assassin. A dangerously disturbed woman who will teach Jaguar the true meaning of fear.
I have the book, though I don't remember much about it. If you remember any other key points about the story I can check them in my copy of the book to see if they match.