No they wont. A friend of my family rehabilitates sex offenders for a living, and it varies from one treatment facility to another, and from one doctor to another, and I don't know what the exact average is but she's been doing this for a long time and the people she treats are 50% less likely to reoffend than the national average.
Unless she's followed them her entire life and they're now dead she doesn't know that. There's a certain segment of the population of criminals that can't be helped. They're called serial killers, child molesters and rapists. We'll see how her sex offenders are doing in ten years.