This question cannot be generalized. Criminal behavior and the possibility of rehabilitation are complex issues and are affected by a variety of factors.： Some studies do show that there is a phenomenon of recidivism, but at the same time, many people have successfully changed their life trajectories. Factors that affect whether a person can reform include： 1. Support system: family and community support 2. Effectiveness of rehabilitation programs 3. Employment and educational opportunities 4. Personal motivation and determination 5. Mental health support Many judicial systems have gradually realized that the focus should be on rehabilitation rather than simple punishment. The view that "no one who has ever committed a crime can change" is too simplified and may hinder the re-integration of former criminals into society. Everyone has the possibility of change, although this road may be full of challenges.